High School DxD Wiki
High School DxD Wiki
If there are those that will hurt my important people then I will definitely defeat them even if they may be a God.

– Issei's new determination upon becoming a High-class Devil, Volume 22, Life 2 And thus, to a High-class Devil

Issei Hyoudou is the main male protagonist of High School DxD. He is a third-year high school student at Kuoh Academy in Class 3-B and a member of the school's "Perverted Trio", a trio of the most perverted men in the entire student body.

He is the Pawn of Rias Gremory's Peerage and a member of the Occult Research Club. After the Evil Dragon War, he was promoted to the rank of a High-Class Devil, becoming the King of his own independent peerage, and is one step closer to fufilling his dream owning a harem and becoming a "Harem King".

Due to his possession of the Longinus; the Boosted Gear, which hosts the Welsh Dragon; Ddraig, Issei is the direct rival of Vali Lucifer, who is the host of the Vanishing Dragon; Albion, who is Ddraig's archrival.


Issei's profile picture

Issei is a high school student of average height with short spiky brown hair, with two short locks of hair behind his head, and light brown eyes. Following his training with Tannin, he gained a more muscular and toned build.[1]

While he has worn various outfits throughout the series, his most commonly worn outfit is the Kuoh Academy boys' school uniform, which consists of a blazer (more commonly black, although in other media is shown with a tinge of purple or grey, with white accents) over a white, long-sleeved dress shirt with black highlights with a black ribbon on the collar, matching black pants, and brown dress shoes. However, Issei's uniform differs in the fact that he wears a red T-shirt underneath his open dress shirt and blazer, and wears blue and white sneakers in place of dress shoes.

Before fighting Riser in a rematch, Issei's left arm was transformed into a Dragon's arm,[2] which needed a ritual performed regularly by Rias and Akeno to appear human. After his "death" he gained a new body through the efforts of Great Red and Ophis, now being able to transform parts of himself into a Dragon.[3]

He has been said to show manly expressions by his paternal grandmother. Issei's height is 170 cm (5 feet 7 inches) and body weight is 62→65 kg (137→140 lbs.).


Issei is shown to be notably unintelligent with an ongoing perverted nature, often to make lecherous fantasies, and utterly obsessed with women's breasts and having his own harem. This has caused him to be instantly labeled as a pervert among the girls of Kuoh Academy and has gained him notoriety for being one of the members of Kuoh Academy's Perverted Trio.

Despite his pervertedness, Issei is courageous, selfless and unwaveringly determined to protect those who are important to him, despite almost dying by the hands of his opponents. Having great kindness, Issei is also very caring, "putting his nose into other people's business" as he helped Yuuto Kiba, Koneko Toujou, and Akeno Himejima overcome their fears and hatred of their mournful past. Due to this, he gained strong friendship from his comrades and affection from most girls of the Occult Research Club and a strong sense of friendship with higher-up Devils like Rias' family; they have told him to use the same titles for them as Rias (Father, Mother, Brother, etc.), yet he still remains the same.

He has a habit as mentioned by his mother of not forgiving himself if he does something wrong: always saying sorry if said thing is mentioned, and showing an expression of pain and regret. He is also fiercely loyal to his comrades and is always willing to stand up for them. Issei's kindness also have a positive influence on others including former enemies. When Issei suggested to Cao Cao to use his True Longinus to help and protect people, Cao Cao acknowledged had he and Siegfried met and befriend Issei earlier, they would not have ended up becoming terrorists in the Khaos Brigade. Another sign of his kind nature is that despite wanting to lose his virginity, Issei refuses to take advantage of women when they are upset, even if they themselves are willing to. This happened when Akeno appeared in front of him naked and wanted to have sex to forget about her sad past and her father. However, Issei refused, knowing it will just hurt her more, and put her clothes back on and hugged her to comfort her.

After his murder by Raynare, Issei had developed a fear of admitting his feelings to the girls, as he thought it would cause them to turn their backs on him. This would also cause him to become oblivious to the feelings of the girls around him (save for Rias after his confession), often believing they are simply teasing him. He acknowledged that this would never happen, but it was still an intense fear. It is also why he was so insistent on trying to lose his virginity, as he believed that no woman would ever want to be in a true relationship with him and that him having sex was the best he could hope to achieve as a sense of relief.

Despite that, even when the girls of the Occult Research Club such as Akeno or Xenovia propositioned him into making love to them, Issei would always initially hold himself back, as he would sometimes look at them with a frightened gaze, a fact which Akeno, Asia and Koneko later noticed. His fears were finally brought to attention when Akeno, Asia, and Koneko confronted him alone and helped him by getting him to admit his feelings and assuring him that they would always love him and so would Rias.[4] This inspired him to finally confesses his love for her which she reciprocated, effectively helping Issei move past his fears.[5] Even with the knowledge that the girls do have romantic affection for him, he still has problems acknowledging some of their ongoing rivalries, an example being who gets to sit on his lap.

In reality, Issei has an innocent side; he is a boy who yearns for love and a true relationship, a side which he only shows to women who can see past his perverted exterior and love him for who he is and who he, in turn, has affections for. He shows this side to the girls of the Occult Research Club, for instance on his date with Akeno or when Rias takes him out on dates.

Initially, after reincarnating as a devil, he set about his desire for a harem as his initial goal, by having his peerage become his harem. After the Rating Game against Sona and Saji, he slightly changed the goal to having a harem peerage that wouldn't lose to anyone. Among his other goals include competing in Rating Games and making Rias the Champion of the Rating Games by becoming the "Ultimate Pawn" alongside Kiba, who promised to become the "Ultimate Knight" with him and his desire to become the Champion of the Rating Games himself after he obtains his own peerage. He is also deeply invested in his rivalry with Vali Lucifer, his Heavenly Dragon counterpart, as Issei promised to get stronger and defeat him, with the both of them reaffirming their promise to fight each other some day multiple times during the series and Vali suggesting that Issei create his own team like Vali which is different from his peerage. Their rivalry would heat up after the both of them enter the Azazel Cup, with Issei creating his own team, "Team Red Dragon Emperor of the Blazing Truth", to try to win the Cup and defeat Vali during the tournament. After the two of them passed the preliminary rounds, the two expressed their desire to continue their initial fight as the both of them promised not to lose until they meet each other in the Cup.

As revealed by Shiva, Issei has a deep desire for peace which is further strengthened by him being the "child" of Great Red and Ophis, as Issei seems incapable of realizing his dream of becoming a Harem King until he obtains peace with his own hands. Due to experiencing intense fights in which he nearly died, Issei affirms his desire to create a world without war and protect his companions even if his enemy is a God.

While initially shown to be unable to understand the appeal of fighting, Shiva reveals that Issei has developed fondness of fighting strong opponents with strong beliefs, with Issei himself confirming that he has come to like defeating strong opponents as equally as groping female breasts. While Issei is shown to like battling strong opponents, at first he was unable to truly "enjoy" a fight (except his match with Sairaorg) due them mostly being life-threatening fights. This began to change after his match with Dulio, as he realized that competing in the Azazel Cup is mostly sport rather than a serious fight.

Issei is shown to admire strong individuals who have strong beliefs and convictions, seeing them as targets for him to catch up to. He is shown to admire Sairaorg Bael, after witnessing his strength and noble splendor and that respect intensified after learning that Sairaorg was talentless like him, as he noted their similar fighting styles. Due to his interest in Rating Games, he has developed a admiration towards Diehauser Belial and Rudiger Rosenkreutz, due to them being the Top 10 Rating Game players, with Issei especially admiring Rudiger Rosenkreutz; as he was a reincarnated devil like Issei himself. As Dragon, he is shown to admire Tannin, admiring his strength and his desire to help other Dragon as Issei considers him the true Dragon King due to his splendor, and Crom Cruach, due to his overwhelming power and his pride as dragon. While he was initially exasperated and annoyed by Fafnir and his panties fetish, Issei is shown to have developed a respect for him after he witnessed Fafnir's willpower and determination to protect Asia from Rizevim.

Issei is noted be be a very friendly person, able to become friends with anyone. Azazel stated that he has the ability to win over the trust of others easily and doesn't discriminate against anyone as others can feel at ease with him due to him not resenting anyone, with Azazel calling that ability a talent of Issei's. Issei's ability to attract companions, allies and enemies is further enhanced by him being the Red Dragon Emperor. According to Cao Cao, despite Issei's lack of natural talent and demonic power, Issei's ability to attract others by holding dragon powers is top notch compared to previous Red Dragon Emperors, as Cao Cao believes that Issei will become the most dangerous Red Dragon Emperor. His ability to obtain the trust of other is so great that the residual memories of the past Red Dragon Emperors sacrificed themselves to protect him from Samael's curse. After coming back from the dead with by using Great Red and Ophis' power, Cao Cao commented that Issei's power to attract the strong is scary due to it attracting powerful beings like the Dragon Gods to aid him. According to Azazel, Issei makes a lot of irregular phenomena occur, for instance; a lot of Sacred Gear possessors near Issei were able to awaken irregular Balance Breakers (such as Yuuto, Gasper and Saji). Ophis stated that Issei is as strong as the number of companions he has. According to Azazel, Issei has the natural ability to make supernatural girls fall in love with him, while Millarca Vordenburg stated that most of the men who meet Issei become fascinated with him.

While initially being confused by his popularity among the devil children due to Oppai Dragon, Issei eventually embraced the role of being the Oppai Dragon and began acting as a hero for the children as was demonstrated in Volume 10, where he carried the wishes of child fans during his match with Sairaorg Bael, promising to defeat him for the sake of Rias and the children who believed in him. Issei has placed the his desire to protect the children of the Underworld and of the other factions as one of his goals as seen when he defeated various foes who threatened the children and their dreams such as Shalba Beelzebub, Grendel, and Erebus. In fact, due to Shalba's insanity and him promising to kill the children of the Underworld for rejecting him as a Satan, Issei killed him to stop his malice from reaching the children.

In battle, Issei is sometimes very stubborn, and due to his emotions, he often charges ahead towards his enemies without a second thought whenever his comrades are insulted, treated badly, or easily defeated. Azazel has stated that it is one of Issei's bad habits. Lately, he has started to become more tactical in his battles, using technique-type strategies to defeat opponents, as shown when he used the abilities of the Wyverns in a unique way to defeat Euclid.

Issei also displays strong moral principles, as seen when he initially refused to actually kill his enemies. Even after killing Shalba Beelzebub, Issei still rarely ever kills his enemies and prefers to either let others do so or simply let them face arrest. While Issei can carry grudges, he is not above forgiving his enemies and becoming friends with them due to his kindness, as seen with Riser, Kuroka, Vali and Cao Cao.


Before Issei's birth, his mother became pregnant twice, but the pregnancies ended in miscarriages. So when Issei's mother got pregnant for the third time, his father had paced back and forth in front of a Shinto shrine honestly wishing that this time they would succeed. When the newborn was finally born he was named Issei, meaning "honesty", for his father's honest prayers.

He is a childhood friend of Irina Shidou and they would always play together back when she still lived in the neighborhood, although he thought she was a boy at the time as he vaguely remembers her. A few times Issei was invited to go to church with her family. On occasions they would stay over at each other's houses, one of these visits when Issei slept over at Irina's, she kissed him while he was sleeping. Eventually, Irina moved to England due to her father's job.

Sometime during his childhood, Issei met an old man who told him and other children stories about breasts, which eventually led to Issei's fascination with them and his perverted tendencies.

He attended the same middle school with Matsuda and Motohama and the three of them started attending Kuoh Academy one year before the story, and have come to be known as the Perverted Trio to just about the entire school.

Powers & Abilities

Demonic Power: Issei has all the powers common to Devils, but his was lower than children, leaving him unable to travel using magic circles. It can be enhanced through promotion to Bishop or Queen. However, his training with Tannin afforded him sufficient demonic power to do so.[6][7]

Issei firing off Dragon Shot.

  • Dragon Shot (魔力弾(ドラゴンショット), Doragon Shotto): One of Issei's signature moves, where he releases a beam of concentrated demonic power. It is often used in tandem with Boosted Gear to increase its destructive potential, once destroying a mountain.[8] He developed a small scale version meant to knock out humans and lessen the damage done.[9] Sirzechs' Power of Destruction inspired him to redirect his Dragon Shots, thus controlling their path, which he used against Cao Cao,[10] and the Jabberwocky.[11]

Issei using Dress Break.

  • Dress Break (洋服崩壊(ドレス・ブレイク), Doresu Bureiku): Issei's second signature move, which he mainly uses against women. As its name suggests, this move allows him to "strip" woman by first coming into contact with them, concentrating his demonic power, then snapping his fingers to activate one of two effects.[12]
    • Ver. B (Body): This move is used to "strip" women by destroying their clothes and/or armor.
    • Ver. A (Astral): This move is used to "strip" women by destroying the effects of spells or abilities that have been used against them.

Issei using Pailingual on female members of the Hero Faction

  • Pailingual (乳語翻訳(パイリンガル), Pairingaru): Issei's third signature move, which allows him to "talk" to women's breasts after creating a "space". As such, it is a useful move as it allows him to learn his opponents' plans by asking their breasts,[13] however, complaints from females from other peerages caused Rias to ban it in Rating Games.[14] A drawback is that if a woman strips in front of him and informs him about her plans hinders Pailingual.[15] In his D×D Form, it is powerful enough to cover an entire island and combined with Penetrate, it can talk to a powerful being's breasts.[16]
    • Pai-Phone (乳語電話(パイフォン), Paifon): A variant of Pailingual, using women's breasts Issei is able to communicate through breasts to other women's breasts.[17]

Issei's Flame Blaze.

  • Flame Blaze (火の息(フレイムブレイズ), Fureimu Bureizu): Due to Tannin's training, Issei learned to breath flames using Boosted Gear. First, he inhales, filling his lungs with air and produce a small flame in his stomach, then uses Boost and Transfer to enhance it, then breathes massive flames from his mouth.[18] He can widen his dragon flame to the point that it can engulf the whole sky as shown in his battle against Cao Cao.[19]
  • Nyuutron Beam Cannon (超乳波動砲(にゅうトロン・ビーム・キャノン), Niyuutoron Bīmu Kyanon): Issei's fourth signature move, which is the end result of assistance from his grandfather and Guanyin, letting him attach his Scale Mail's tail onto a woman's breast to convert their "Breast Power" into demonic power with their bust size displayed on his gauntlet's jewel and determines how powerful the blast will be. By using Rossweisse's breasts, which are "96", he could launch an enormous pink blast comparable to Infinity Blaster, defeating the Strongest Grim Reaper, Thanatos.[20]
  • Summoning: Issei can summon his familiar, Ryuuteimaru.[21]

Issei punches Fenrir's son.

Immense Strength: At first, he was weaker than devil children,[22] but training in the mountains and powered up using Boosted Gear lets him rival High-Class Devils, able to combat Riser's servants.[23] Tannin's training made it possible for him to erase a mountain after donning Scale Mail;[24] outclassing Diodora empowered from Ophis' snake.[25] Having awoken Triaina, and Crimson Armor, Azazel stated no one among the Young Devils aside from Sairaorg can fight him,[26] equaling an Ultimate-Class Devil. From Sun Wukong's training, then upon awakening Diabolos Dragon, he overpowered Rizevim,[27] then managed to defeat Apophis.[28] Issei grew strong enough to the point that Baraqiel couldn't defeat him without it,[29] then fight against Dulio and Thanatos, the strongest among their particular groups, defeating the latter.[30] Drinking Amrita, in Pseudo D×D God, he fought and bested Vidar, donned in his dragon armor.[31] Ddraig noted the Crimson Armor reaches Satan-Class, while Pseudo D×D God reaches Super Devils,[32] defeating Rias using Balor Princess.[33] He defeated Erebus, deflecting a blast that could have defeated 100 devils, then Tartarus, while using A×A, which could destroy the world.[34][35] He overpowers Angra Mainyu by using True D×D, then Hades after teaming up Vali and Team D×D, now being recognized as a Super Devil.[36][37]

Isse deflects all of Diodora's demonic power attacks.

Immense Durability: Issei was originally very weak and vulnerable, easily hurt by the simplest attack. Through the use of Promotion, he can increase his defense. After his training with Tannin, where he was forced to survive Tannin's continuous assault, Issei's durability greatly improves, along with his daily training further enhanced his durability to the point where his body could withstand continuous usage of the Boosted Gear which he couldn't do so in the beginning. In fact, Issei's durability has been proven several times against opponents like Sairaorg Bael, Cao Cao, Grendel, and many others. Issei can endure Baraqiel's Holy Lightning and continuing to fight despite the intense pain.[38] Issei can withstand Vidar's attacks even when he is wearing his Ragnarök Earth Berserk armor and even his signature move; Fimbulvetr Shot, the impact of which sent Issei crashing onto artificial Yggdrasil.[39]

  • Flame Resistance: Because of his training, Issei has also developed a high degree of resistance to fire attacks, so that only the most powerful flames, such as those of a Dragon or the Phenex Clan, can injure him.

Issei chases after Vali.

Immense Speed: Through the use of Promotion, Issei can increase his speed. In his Balance Breaker state, he can use the booster to further increase his speed. In his DxD Form, he was able to appear in front of Rizevim before he can react.[40] He was able to keep up with Vidar in his Ragnarök Earth Berserk. In his Pseudo-Diabolos Dragon form, he was easily able to keep up with Yuuto Kiba, who is famous for his exceptional speed, until Kiba revealed his Drag Knight Boosters.

Immense Stamina: Issei originally possesses average stamina. After being reincarnated into a Devil along with his daily training with Rias, Issei obtains more stamina to use the Boosted Gear. Following his training with Tannin in the Underworld, Issei obtains even more stamina, that he could use when in Balance Breaker. He eventually obtains enough stamina to activate his Scale Mail without a countdown. In Volume 23, he was able to keep fighting at his best throughout the whole two-hour Rampage Ball Rating Game.

Dragonization (龍化, Ryū-ka): Having sacrificed his left arm to Ddraig, it transformed into a dragon's arm, becoming immune to blessed items.[2] In becoming a Humanoid Dragon, having his new body made from Great Red's flesh,[3] Issei can now transform any part of himself into a dragon, fighting against three Magicians and broke their defensive magic using one punch;[41] and can grow dragon wings on his back for flight.[42] However, once the transformation happens, he needs the dragon power to be drained to appear human from the transformed section by Rias or Akeno.

Issei fighting against Sairaorg.

Master Hand-to-Hand Combatant: Issei relied on brawling in combat, using his Boosted Gear's power augmentation and the gauntlet itself to take down enemies with powerful punches. After training with Kiba and Koneko, Issei could hold his own against Riser's peerage whom had more combat experience. His intense training with Tannin, survived the former Dragon King's relentless assaults, significantly strengthened his physical prowess and improved his fighting skills, allow him to fight much more powerful enemies, using Boosted Gear Scale Mail's enhanced power and protection more efficiently compared to when he fought Riser and Vali using an incomplete Balance Breaker, easily cornering Kuroka who had Ultimate Class Devil strength, even angrily overpowered Diodora Astaroth, a High Class Devil enhanced by Ophis's snake. His skills grew to where he could go toe-to-toe with Sairaorg, an extremely powerful Devil master martial artist in a fistfight. From regular training with Kiba and then Sun Wukong, it improved to where he could handle fighting against Diehauser and Rizevim, powerful devils adept in combat, the latter after using DxD. He could fight against Baraqiel using his Crimson Armor who infused his strikes with Holy Lightning.[38] In Pseudo-DxD enhanced from the Amrita fought against Vidar who excelled in his kick-based style enhanced using his Ragnarök Earth Berserk.[39] His experience and mastery of hand-to-hand combat allowed him to overpower Gressil, a powerful Satan-Class Devil until the latter started using his Resistance to make him more resilient against attacks.[43]

Skilled Swordsman: Though Issei isn't as skilled as Kiba, Xenovia or Irina in swordmanship, he has learned the basics from Kiba, which has been improved from training sessions. As such, he can wield Ascalon as an arm blade extension of his Boosted Gear allow him to cut off Cao Cao's arm. Issei could deflect strikes from Thanatos' scythe using Ascalon, then fought Vidar using both it and Ascalon II. Issei develops a technique to shoot out his swords at his opponent enhanced by using both Boost and Penetrate. He could block a strike from Kiba's superior swordsmanship with Gram using Ascalon.[44] His skills has allowed him to wield all three Ascalon against Angra Mainyu, even using feints against him before stabbing him with his Tail Blade.

Skilled Tactician: Though outsmarted and considered an idiot, Issei has basic tactical knowledge, focused on surprising opponents. He carried holy water and a cross to counter Riser's Immortality;[2] then overcharged Vali's wings after transferring power to them, breaking his armor using Ascalon.[45] Issei acted as the Kyoto Team's leader, letting them face the Hero Faction;[46] Kiba mentioned despite being simple, his orders let their group properly fight and defend themselves. He could also plan ahead of time, using a bullet with Samael's blood to defeat Cao Cao, who had Medusa's Eye, making him vulnerable to it. Issei used Dividing Wyvern Faeries to in a unique manner to combat Euclid, who'd outmatched him in Crimson Armor. Against Kiba, he transferred power to him, thus making him lose control of his armored boosters;[44] then taking advantage of the fact Rias wasn't familiar with his Nyuutron Beam Cannon, surprising and defeating her. Issei is currently learning Rating Game tactics from Ravel.

Survival Skills: Because of his training under Tannin, Issei has developed survival skills.

Stealth: Issei has also learned how to mask his presence from people.

Master Artisan: Issei is a very talented sculptor, able to create a perfect statue of Rias Gremory with his eyes closed from memory which impressed his teacher and his friends in classroom.

Master Actor: Issei has immense potential in tokusatsu acting, as his show Oppai Dragon has immense success and popularity not only among the Devil children of the Underworld, but also other mythological factions. His show has gained him countless fans such as Le Fay, Bennia, Millicas, Lirenkus, Natsume and Balberith.

Skilled Dancer: Due to being taught by Venelana Gremory, Issei became skilled in social dancing, able to coordinate with Rias in dancing well enough to pass the dancing trial in the ruins of connection

Flight: While Issei still lacks the ability to fly using his Devil wings, Issei being a former Dragon can fly using his Dragon wings.


Issei summoning the Boosted Gear

Boosted Gear (赤龍帝の籠手(ブーステッド・ギア), Būsuteddo Gia): Issei's Sacred Gear and main weapon, among all the original 13 Longinus, which holds the Welsh Dragon, Ddraig's soul, making it a Mid-Tier Longinus. A left-handed red gauntlet that doubles his powers every 10 seconds until he reach his limit, letting him rival High-Class Devils, holding the potential to kill god if mastered. He later gained the ability to Transfer the multiplied power into a person or item, even parts like his eyes for enhanced vision. Issei later awakened Penetrate, letting him bypass all defenses like Rizevim's Sacred Gear Canceler, letting his attacks make contact; transferred into his eyes lets him see through anything, even woman's clothing.

Boosted Gear: Scale Mail

  • Boosted Gear: Scale Mail (赤龍帝の鎧(ブーステッド・ギア・スケイルメイル), Būsuteddo Gia: Sukeiru Meiru): Boosted Gear's Balance Breaker, which creates a red dragon armor and became his primary form. Issei activated an imperfect one twice, the first time as he sacrificed his left arm to Ddraig as a pact lasting ten seconds, and the second using a bracelet from Azazel, in which lasted fifteen minutes. He achieved a perfect Balance Breaker due to training with Tannin, but reached this after poking Rias' breasts to trigger the evolution. Scale Mail allows him to Boost without the ten second limit and strengthened his powers and abilities to the point of destroying a mountain and Kuroka's spatial barrier firing off a blast. At first, Issei could either enhance his speed and achieve flight using the boosters on his back, but attained retractable dragon wings after activating Juggernaut Drive, as well as its using the Pteranodon-like claws as arms.

Issei in his Incomplete version of Juggernaut Drive with Divine Dividing jewels

  • Juggernaut Drive (覇龍(ジャガーノート・ドライヴ), Jagānōto Doraivu): A form unique to Boosted Gear and Divine Dividing, which releases the seals placed on the Heavenly Dragons temporarily granting the user immense power rivaling God, however, at the cost of his sanity and lifespan. Issei indirectly activates an incomplete Juggernaut Drive after believing that Asia was killed by Shalba with his negative emotions overpowering him thus triggering its activation. In this state, his Scale Mail becomes more organic appearing more like a miniature dragon, creating dragon arms and blades from the gems. Issei's immense power and speed allowed him to completely overpower Shalba,which makes his movements almost impossible to follow.
    • Longinus Smasher

      Longinus Smasher (ロンギヌス・スマッシャー Ronginusu Sumasshā): Its finishing move and one of his most powerful attacks, which opens a hidden launcher on his chest before releasing an enormous amount of aura of immense destructive power. Ddraig described it as a forbidden power he shouldn't have, which can change the environment, if shot on land, then the entire area would vanish, and if shot in the air, the aura will dye the sky red.[47]

The 3 Forms of Illegal Move Triana

  • Illegal Move Triaina (赤龍帝の三叉成駒(イリーガル・ムーブ・トリアイナ), Irīgaru Mūbu Toriaina): The Illegal Move Triaina is a specialized technique used by Issei Hyoudou that changes his Scale Mail armor into three different forms based on the Evil Pieces system.
    • Welsh Sonic Boost Knight (龍星の騎士(ウェルシュ・ソニックブースト・ナイト), Werushu Sonikku Būsuto Naito): Triaina's Knight form. In this form, Issei possesses enormous speed that far surpasses Sairaorg's speed, but to make full use of it, Issei must shed his excess armor, causing it to become thin to the point where it has low defense, making him vulnerable to powerful attacks.
    • Welsh Dragonic Rook (龍剛の戦車(ウェルシュ・ドラゴニック・ルーク),Werushu Doragonikku Rūku): Triaina's Rook Form. In this form, Issei possesses a massive amount of power and defense but has a low body maneuvering speed because of the massive, thickened armor.
      • Solid Impact (ソリッドインパクト, Soriddo Inpakuto): It's respected finishing move that delivers a punch that has its power and speed increased by nailing the percussion hammer located at his elbow.
    • Welsh Blaster Bishop (龍牙の僧侶(ウェルシュ・ブラスター・ビショップ), Werushu Burasutā Bishoppu): Triaina's Bishop Form. In this form, Issei possesses an enormous amount of demonic power, which he applies it to the two cannons at the back of his armor.
      • Dragon Blaster

        Dragon Blaster (ドラゴンブラスター Doragon Burasutā): It's respected finishing move that is a severely boosted equivalent of his Dragon Shot capable of leveling battlefields and briefly warp space-time. The drawbacks to that the amount of time it takes to charge the cannons and stamina lost with each shot.

Cardinal Crimson Promotion

  • Cardinal Crimson Promotion (真紅の赫龍帝(カーディナル・クリムゾン・プロモーション), Kādinaru Kurimuzon Puromōshon): The Scale Mail's Queen form that is achieved by gaining the "True Queen". This form changes the color of Issei's Scale Mail armor from red to crimson. Cardinal Crimson Promotion incorporates all three Evil Pieces traits, making it the most balanced and most powerful form of Issei's Scale Mail. In this form, Issei is capable of using enhanced versions of the Illegal Move Triaina's abilities. This form, however, is still unstable and requires mastering the three forms of Illegal Move Triaina to stabilize its powers. Issei can now enter True Queen without having to chant, and due to Diabolos Dragon God, its power has been increased.[48]
    • Solid Impact Booster: By morphing one of the armor's gauntlets into Welsh Dragonic Rook's, it allows it for an enhanced version of Solid Impact. It can also be used in tandem with Ascalon to deal further damage to Dragons.
    • Crimson Blaster: An enhanced version of Welsh Blaster Bishop's "Dragon Blaster" that shoots a powerful beam from the wings of the armor.
    • Dividing Wyvern Fairy (白龍皇の妖精達(ディバイディング・ワイバーン・フェアリー), Dibaidingu Waibān Fearī): Originally taking the form of Dividing Gear, a white gauntlet on Issei's right hand which he obtained in his initial battle against Vali.[45] Issei placed one of the jewels on Vali's armor to him, creating the Dividing Gear which allows him to use Albion's dividing powers. It, however, reduces Issei's lifespan and thus was banned by Azazel. Issei is no longer able to use Dividing Gear after gaining a new ability that allows him to create small white Wyverns from the gems of his armor that can not only Divide but can also Reflect incoming attacks.[49] Unlike the Dividing Gear, It only requires Issei's stamina rather than reducing his lifespan. Issei manages to change the white Wyverns red at will where they are able to use Ddraig's powers of Boost, Transfer and Penetrate instead.[50]
      • Crimson Extinct Dragonar (深紅の滅殺龍姫(クリムゾン・エクスティンクト・ドラグナー), Kurimuzon Ekusutinkuto Doragunā): After training with Rias, Issei manages to make use of the red Wyverns to attach themselves on Rias to create her own variation of the Boosted Gear Scale Mail.
      • Crimson Destruction Dragonar (真紅の破壊龍騎士(クリムゾン・デストラクツョン・ドラグナー), Kurimuzon Desutorakushon Doragunā): Issei also made use of the red Wyverns to attach themselves on Xenovia to create her own variation of the Scale Mail.
    • Longinus Smasher: Issei gains access to this ability when the Red Wyverns used Boost on him while in this form. An ability initially available to Juggernaut Drive that from the chest appears a launcher that fires a powerfully destructive beam. This, however, leaves strong fatigue on Issei as it drains a lot of his stamina and depending on how one uses it, it can change the environment. Due to its immense power, this ability has a very long recharge period, lasting at least a month.
    • Tail Blade: Using the Ascalon II Prototype, Issei with his tail of his armor can attack with its blade and lengthened the tail towards his enemies at high speed.

Diabolos Dragon God

  • Diabolos Dragon God (龍神化(ディアボロス)-『D×D(ドラゴン)』・G(ゴッド)-, Diaborosu Doragon Goddo): An upgraded form, which is the result of Issei releasing Ophis' power within him and his flesh being created from Great Red's, causing his Scale Mail to turn crimson and black, two pairs of dragon wings, and ∞ on all his gems. In his form, his Boost is changed into D∞D, letting him overpower Rizevim and his Sacred Gear Canceller. However, Issei can only sustain it for a short period, causing severe pain and complications making even death pale in comparison. After the Evil Dragon War, Ophis adjusted it, removing the "Infinite" and named it Pseudo-Dragon Deification, but he can only maintain if for three minutes, lessening the time to ten seconds if he attacks or defends. In Vol 25, due to drinking the simplified Amrita, Issei can maintain it for eighty-eight minutes. In True Vol 4, after recovered his sexual desires, Issei unlocked the True-Dragon Deification after Great Red's flesh resonated. In this state, Hades stated his power was greater than his Pseudo Diabolos Dragon with the aura of a devil, dragon, and god.
    • Infinity Blaster (インフィニティ・ブラスター, Infiniti Burasutā): A further enhanced version of Crimson Blaster, the wings contain cannons that shoot out a powerful blast of red and black aura that leaves even Rizevim injured to an extent that his body is almost fatally damaged. By using it, DxD G's time limit of three minutes is cut down to ten seconds. After drinking miracle drug Amrita, Issei has overcome this weakness and can maintain his armor after shooting Infinity Blaster.
    • Longinus Smasher (ロンギヌス・スマッシャー, Ronginusu Sumasshā): The form is not only capable of this move, but the blast it shoots out has been enhanced with the power of infinity, delivering further damage. It can also be used in tandem with the Infinity Blaster, fusing the two blasts into an even more powerful attack.
    • Blazing Inferno of Scorching Flames (燚焱の炎火(いつえきのえんか), Itsu Eki no Enka): An ability that was sealed by the God of the Bible, which Issei managed to unlock upon using his DxD form for the second time in Vol 21. Issei releases a powerful breath of fire that can incinerate anything, flames that never go out once ignited as they continue to burn even after being reduced to ashes and can probably burn the soul until nothing remains. The only existences known to be immune to these flames are Albion, Ophis, and Great Red. Its area of effect can cover an entire island.
    • Partial Pseudo-Dragon Deification (部分龍神化, Bubun Ryūjin-ka): In Vol 23, Issei can perform a partial Pseudo-Dragon Deification on his armor, letting him channel his dragon god aura to some extent, but still lessens the stamina consumption. He could channel it into his left arm, letting him strengthen his various techniques such as Dress Break, Solid Impact Booster, and Dragon Shot; through transforming his wings using this allows him to move at greater speed.
    • Dress Break DxD (洋服破壊(ドレスブレイク)龍神式(ディーディー), Doresu Bureiku DīDī): By using his Dragon God aura, Issei can increase his range that halts a female target’s movement, and by strengthening his left hand he can destroy their clothes without even touching them.
    • Red Dragon Emperor Ddraig Manifestation (赤龍帝ドライグ顕現, Sekiryūtei Doraigu Kengen): Due to drinking the miracle drug Amrita, Issei gained the ability to summon Ddraig into battle after the [8] countdown on the right gauntlet reaches zero.

Apocalypse AnswerArms

  • Apocalypse AnswerArms (A × A(アポカリュプス・アンサーアームズ), Apokaryupusu Ansāāmuzu): Issei's AxA form. This form is the result of Issei combining with his familiar Ryuuteimaru, who manifests Great Red's power due to him being Issei's familiar thus allowing him to make use of Great Red's aura in Issei's body. The power of this form is so great that it overwhelms Tartarus, a Primordial God in Greek mythology. It has the power to destroy the entire world with its destructive power. Because of the weapons that were installed in Ryuuteimaru, Issei has gained new abilities in this form. The drawback of this form is that it has an extremely high consumption rate which gives it a short time limit. Furthermore, Ryuuteimaru is unable to move for a few days and Issei himself suffers fatigue for a few days. It is determined that these burdens compared to DxD G are much lighter.
    • Revelation Barrier (レベレーション バリアー, Reberēshon Bariā): Creates a stronger barrier around the body and is powerful enough to withstand attacks from gods such as Tartarus.
    • Revelation Blade (レベレーション ブレード, Reberēshon Burēdo): With four arms of his Apocalypse AnswerArms form, each of the arms carries a aura blade known as Apocalypse Ascalon(アポカリュプス・アスカロン, Apokaryupusu Asukaron), which can easily cut through anything like Tartarus’ tentacles.
    • Revelation All-Range Blaster (レベレーション オールレンジ ブラスター, Reberēshon Ōrurenji Burasutā): Similar to Cardinal Crimson Promotion and Diabolos Dragon God, Apocalypse AnswerArms has many cannons to fire powerful blast of auras that can destroy Tartarus’ magic barriers like paper and destroys almost half of his body, even as Issei held back his power. The blast of destructive energy is so powerful it can alter the environment and is strong enough to destroy the artificial space created Dimension Lost. Issei states that the blast is comparable to several Infinity Blaster's blast attacks combined.

Pawn Piece (兵士(ポーン)(こま), Pōn no koma): Due being the possessor of Boosted Gear, Issei needed to be reincarnated using eight Pawn Pieces, granting him more power than a normal pawn. As a Pawn, he can promote to either a Queen, Rook, Bishop, or Knight. Since his Pawn started adjusting to Ddraig's power, four of his Pawn Pieces turned into Mutation Pieces with different values due to Illegal Move Triaina and Cardinal Crimson Promotion,[51] then the rest turned into Mutation Pieces due to Diabolos Dragon, [52] a phenomena that even their creator couldn't believe.

Issei promotes to Queen

  • Promotion (プロモーション, Promōshon): Being a Pawn, Issei can use the promotion to temporarily gain the traits of a Queen, Rook, Knight or Bishop. In Volume 8, after Ajuka Beelzebub rewrote Issei's Evil Pieces, Issei can now use Promotion anytime and anywhere without the King's permission.
  • Castling (キャスリング, Kyasuringu): Upon becoming King of his own peerage, Issei gained the ability to use this move, which allows him to swap locations with one of his Rooks. He first used it in his match with Baraqiel to escape a sealing barrier by switching with Rossweisse.

Ascalon inside of the Boosted Gear

Ascalon (アスカロン, Asukaron): Issei's second weapon, received from Michael, having been through a ritual by the Three Factions' leaders so he could wield it despite not having the light attribute, and being a dragon host. It was stored in Boosted Gear, letting him extent Ascalon from the gauntlet, and being imbued with Ddraig's power, resulting in an enormous boost in power. Not being a swordsman himself, Issei often channels its dragon slaying powers into his punches, making it easier to harm dragons, and could infuse it into his Crimson Blaster. He could endow Ascalon with Boost and Penetrate, the effects lasting even after launching it as a projectile at Vidar.

Ascalon II (アスカロンII, Asukaron II): The second version of Ascalon. A long sword that releases holy aura, but is more of a dragon sword rather than a Holy Sword. Issei keeps this sword within his right gauntlet that was free.

Ascalon II Prototype (アスカロンII プロトタイプ, Asukaron II Purototaipu): The initial prototype model of Ascalon II that Issei used. Due to being created for Issei's use, other people cannot use it which is why the Vatican team that created it left it to him. Although it does not have the same ability as Ascalon II, it is still quite strong. Issei fused it to the tail of his armor to create the Tail Blade ability to suprise enemies with a third arm.

Mjolnir Replica (Temporarily): During the battle against Loki, Issei was temporarily lent a replica of the legendary war hammer used by the Norse God of Thunder. At first, he was unable to wield it due to harboring evil thoughts, which were his perverted desires, though he became capable of using it after being blessed by Chimune Chipaoti. He later returned the hammer after Loki's defeat.


Light Novel

  • (Issei shouting out his dreams): I’m going to become a Harem-King! (Volume 1, Life 2)
  • "I’m dumb so I don’t know anything about “foreseen” or “checkmate”. But I can still fight. I can continue fighting as long as I can crunch my fist!" (Volume 2, Life 5)
  • "President Rias Gremory's virginity belongs to me!" (Volume 2, Life ∞ vs Power ∞)
  • (To Rias):"President! I don’t have talent for swords like Kiba! I’m not a genius like Akeno-san at using demonic-power! I don’t have a crazy strength like Koneko-chan, nor do I have a healing power like Asia! Even still, I will become the “Strongest Pawn”! For you, I will even beat God! With this Boosted Gear! My only weapon! I will make sure that I will protect you!" (Volume 2, Life ∞ vs Power ∞)
  • (To Rias): "Then I will give my right arm as a price next time. Then my eyes if another one comes in. I will keep on saving President. That’s the only thing I can do. But I will definitely come and save you. That’s because I am Rias Gremory’s [Pawn]." (Volume 2, Last Kiss)
  • (To Yuuto): "Kibaaaaaaaa! Cut down both Freed and Excalibur! You are the “Knight” of the Gremory group and my comrade! My friend! Fight Kibaaaaaaa! Don't waste their feelings and spirit!" (Volume 3, New Knight & New Rival)
  • (To Gasper): "...Are you scared? Of the Sacred Gear...and of us? “I also possess a Sacred Gear in which the strongest Dragon resides in. However, my life was not as amazing as yours, who was a Vampire, or like Kiba’s. I was a normal male high school student. I...to be honest, am scared. While using the Dragon’s powers, I feel that some part of my body is changing into something else. I don’t know much about Devils right now either, or about what a Dragon is. However, I feel like I want to proceed further." (Volume 4, Life 3)
  • (To Akeno): "Ah, how do I say it, Akeno-san, you’re a kind Senpai. No, um, I definitely hate Fallen Angels, but I think that Akeno-san is different. Even if you have the blood of Fallen Angels in you, Akeno-san is Akeno-san, and you are the Vice President of the Occult Research Club. I have never once had thoughts of dislike towards Akeno-san. Even after hearing that Akeno-san has the blood of Fallen Angels, I cannot come to hate you. I like you even now, so there’s no problem, right? Huh? What the hell am I saying? Sorry, no more sensitive words are coming to me..." (Volume 4, Life 3)
  • (To Vali): "I’m going to kill you, you bastard....Just as you said, my father is an ordinary office worker who works from morning to evening for our family. My mother is an ordinary housewife who makes delicious food for our family morning, noon and evening. However, they raised me up to this point. To me, they’re the best parents...Kill them? My father and mother? Why should they have to be mixed up in the situation of someone like you and be killed? As if I know anything about things like valuable or destiny!" (Volume 4, Life 5)
  • "Stupidity is fine! If I can't win with ability, I'll excel through stupidity!" (Volume 4, Life 5)
  • (To Koneko): "Koneko-chan…though I have a legendary dragon lodged in my body, I can’t do anything…If I had gotten stronger those times with Asia and Buchou, if I had displayed my dragon power, they wouldn't have had such sorrowful experiences…—I’m a talentless and useless devil. Even though all the previous Sekiryuuteis achieved Balance Breaker in a short time…it will take who knows how many months for me. I understood that. I already understood that from the very beginning. Even though I possess the power of the Sekiryuutei, it’s wasted on me. Because I’m useless…I can’t do anything for you, Koneko-chan. I thought I could at least become a shield for you, but…" (Volume 5, Life.3)
  • (After attaining Balance Breaker): "Balance Breaker, [Boosted Gear Scale Mail]! It’s been achieved here by poking my master’s breasts!" (Volume 5, Life.3)
  • (To Kuroka): "Don’t make my cute kouhai cry. If you aim at Koneko-chan again, I won’t stop my attack next time. You may be a woman and Koneko-chan’s onee-san, but you’re my enemy!" (Volume 5, Life.3)
  • (To Koneko): "I’ll declare this to Koneko-chan too. Even if you run out of control with your nekomata power, I’ll stop you. I want to use this Sekiryuutei power not only for myself, but for my friends too. And even if that scary onee-san comes again, I’ll definitely save you. Since I’ll blow away that nee-chan with a punch, you don’t need to be scared." (Volume 5, Life.4)
  • (To Genshirou): "Come, Saji. Come! Sajiiiiiiiiiiiii! You won’t let it end here, right!? You don’t intend to let it end like this, right!? Weren’t you going to do the things that aren’t possible for idiots like us and run swiftly forward!?" (Volume 5, Life.5)
  • "Hey, Saji. Which one of us will advance to being a high-class devil first and have our dreams granted? I—won’t lose! Absolutely. And next time we fight, I’ll win for sure! So, until next time. My rival, Saji Genshirou." (Volume 5, WINNER)
  • (To Diodora): "Don’t make our Asia cry!" (Volume 6, Life 4)
  • (To Diodora): "Don’t ever get near Asia again! The next time you show yourself before us, then that time I really will blow you away!" (Volume 6, Life 4)
  • (To Asia): "I…..! I……! I made an oath that I won’t let Asia go through sadness again! That’s why I won’t let you do that! I will protect you! Yeah, I will! I will definitely protect Asia!" (Volume 6, Life 4)
  • (To Asia): "Asia, stay by my side forever. You aren't allowed to leave me again." (Volume 6, New Life)
  • "That's because we have to look if there is an Oppai in front of us!" (Volume 7, Life 2)
  • (To Vali): "I….will become the 'Ultimate Pawn', and I will be alright if I can become a high-class devil. I’m aiming to make my own kind of a harem." (Volume 7, Life 3)
  • (To Akeno): "……I will just stay like this and hug you! I won’t do ecchi things to you! I….I am lecherous! I really want to have sex with Akeno-san! But I don’t want to make love with you with these kind of feelings!" (Volume 7, Life 3)
  • (To Akeno): "-I will stay by your side. I will always stay by your side whenever you feel sad. I will hug you like this anytime. So please. Please cheer up." (Volume 7, Life 3)
  • "Buchou, I will become stronger for you and my comrades." (Volume 7, Life 3)
  • (To Genshirou): "It seems like my road to becoming a Harem-king is rough, so I have to break every single obstacle on my way. For that, I will have to adapt to the power of the Sekiryuutei and other kinds of power and make them my own. –There are many things I want to make a reality and many things I want to protect. I have to walk right ahead no matter what."
  • (To Connla): "Due to the things you do, there are those who are crying sadly. No matter what your reasons are, I must blow you away." (Volume 9, Life 4)
  • "Sairaorg-san, Vali...and Cao Cao. I won’t lose, and I definitely will become stronger. Much stronger. I believe that, one day, my dreams will come true... Elsha-san, Belzard-san, though we parted in a most ridiculous manner, please continue watching over me from wherever you are. As the Sekiryuutei, as the Oppai Dragon, I will do what I need to do." (Volume 9, Maven)
  • (To Lirenkus): "Lirenkus, men shouldn’t cry. You have to become strong so that you can protect a girl no matter how many times you fall, and keep on standing up." (Volume 10, Life 1)
  • (To Asia, Akeno and Koneko): "…….Asia, Akeno-san, Koneko-chan….I’m scared. I’m actually scared of getting along with girls….. Because it makes me think that the same thing will happen again…..! The girls in our group are being kind to me, but if I tried to take another step and try to get along with everyone, it makes me think everyone will reject me and laugh at me…..! I know that everyone isn’t bad inside my head! All of you are good people! But, I still can’t! The more I tried to understand everyone, the more it makes me stop!……I don’t want to taste…..the same thing again….." (Volume 10, Life 2)
  • "I’m Hyoudou Issei. The current Sekiryuutei. I’m also the Chichiryuutei, and the Oppai-Dragon. So I will be fighting while carrying the dreams of many people, huh. I need to take this match with a different feeling to that of the time when I had the Riser-match and Sitri-match. For myself, for Buchou, for my comrades, and for the children supporting me….. Let’s go, Ddraig. There are many things we have to accomplish, but the things we need to accomplish are simple." (Volume 10, Life 3)
  • (To Coriana Andrealphus, before defeating her): "You take off the bra, then the pants!" (Volume 10, Life 3)
  • (To Sairaorg, before their fight): "I have no grudge against you. I have no hatred towards you. This is just a game. But I will be taking revenge for my comrades. I’m not mature enough to forgive you when you have taken down my comrades……..!" (Volume 10, Life.MAX VS Power.MAX: MAN(Red Dragon Emperor) VS MAN(Lion King))
  • (To Sairaorg): "Today I will claim victory by defeating you, who becomes serious! We are fighting for our dreams! What can we achieve by not defeating our opponent who is at his best!?" (Volume 10, Life.MAX VS Power.MAX: MAN(Red Dragon Emperor) VS MAN(Lion King))
  • (To the past Boosted Gear possessors): "Let's go Senpais! I’m a Sekiryuutei! Oppai-Dragon! The man who is in love with Rias Gremory! I am Hyoudou Isseeeeeeeeeeei!" (Volume 10, Life.MAX VS Power.MAX: MAN(Red Dragon Emperor) VS MAN(Lion King))
  • (To Sairaorg): "Rias Gremory is the woman I love. I want the woman I love to win. I want to protect the woman I love. I want to fight for the woman I love. I……..I! I will defeat you in front of the woman I love and the children who follow me! For my dream! For the children’s dream! For Rias Gremory's dream! Today I will surpass you! I looooooooove Rias Gremory!!" (Volume 10,Life, MAXIMUM VS Power MAXIMUM: Crimson and Red)
  • (To Sairaorg): "……Haa…….Haa……. I also have a dream! To make…….Buchou the……King of the game……. I will……also become a King one day! I will become stronger than anyone! I……! I will become the “Ultimate Pawn”……..!" (Volume 10,Life, MAXIMUM VS Power MAXIMUM: Crimson and Red)
  • (To Rias): "……I……I want to protect Rias…I want to protect Rias for the rest of my life…… I am in love with you! I love you Rias!" (Volume 10,Life, New Life)
  • (To Ouryuu and Bova): "I am indeed disappointed, but we have learnt a lot in this game. In my view, phrases like ‘there’s no meaning in losing’ or ‘there’s nothing to be gained in losing’, are not true okay? Listen up, Bova, Nakiri. Self-attribution is what makes the people who are defeated more powerful. Because — in order to erase any regrets, you must obtain victory." (Volume 23, Life.Youth)


  • "I'll never forgive anyone who makes our president cry!" (Season 2 New)
  • (To Irina) "No way, no way in hell. I’ve invested my entire aptitude in magic for this. Would you have me develop a technique that allows me to see through women’s clothing instead? I made such a choice bearing my thoughts, worries and all. I shall...I shall destroy more women’s clothes and then...and then...and then someday, as I gain the ability to destroy them just by looking, I shall continue my fight!" (Season 2 New, Episode 3)
  • (To Irina) "Lechery is my strength! Lechery is my justice!" (Season 2 New, Episode 3)
  • (To Matsuda and Motohama in school) "Boobs are heavier than someone's life." (Season 2 New, Episode 4)


  • Issei's birthday is on April 16.[53]
  • Issei's name means "Sincere/Honest".
    • His father gave him the name with the hope that he would be able to lead a honest life.[54]
    • His surname means "Soldier" in reference to him being a Pawn, as pawns are considered to be foot soldiers in chess analogy. So his full name means "Sincere or honest soldier".
  • Despite not officially being a member of the Gremory clan yet, he is already considered one by the members (minus Rias) and their servants. After proposing to Rias, she also considers him a member as her future husband and fiance.[55]
  • After his visit to the Underworld and meeting the Gremory family, it is noted that Issei acquired gentlemanly behaviour as well as knowledge about the Gremory clan's history and general knowledge about the Underworld, due to the fact that Rias chose Issei as her lover and future husband, thus requiring him to obtain noble etiquette to serve as Rias' husband.[56]
    • Due to the teaching he received from the hired Gremory instructor as well as Venelana Gremory, Issei became skilled at dancing, table manners and very knowledgeable about the Gremory clan's history and general knowledge about the Underworld.[57]
  • Issei is engaged to Rias Gremory[58], Akeno Himejima[59], Xenovia Quarta[60], Irina Shidou[60], Asia Argento[61], Koneko Toujou[62], Kuroka[62] and Rossweisse[63].
  • His first kiss was with his childhood friend Irina Shidou, albeit he was asleep.[64]
  • In Rating Game fighting-types, Issei is considered a Power-type while also being a good Support-type due to his Boosted Gear Gift ability.
  • Issei started off with eight pawn pieces, which Azazel noted Ddraig represents a total of 7.9, Issei, on the other hand, represents 0.1.[65] However, four of them turned into Mutation Pieces with different values, three of them due to the Illegal Move Triaina, and the fourth due to Cardinal Crimson Promotion.[66]. And after attaining Diabolos Dragon, the remaining pieces turned into Mutation Pieces.[67]
  • According to the Nilrem Magicians, Issei's strength is ranked in SS-Class.[68]
  • Issei shares the meaning of the series' title that refers to Great Red: "Dragon of Dragons" as he can be considered a mini Great Red, who the title mainly refers to.
    • He along with Vali have made another meaning for the title that refers to themselves: "Diabolos (Devil) Dragon".
    • Issei's life force is currently unreadable due to his body being made from Great Red's flesh and Ophis' powers. At its lowest which is zero, it represents "dream" or Great Red and at its highest which is infinite, it represents "infinity" or Ophis.[69]
    • According to Ophis' spawn; Lilith, Issei smells like her, Ophis, and Great Red.[70]
    • According to Elmenhilde, Issei's blood tastes sweet, mellow, and rich, and is absolutely addictive.[60]
  • In drinking the simplified Amrita, Issei's "oppai power" has gained traces of divine nature, allowing him to communicate with Chimune Chipaoti.
  • Issei is very popular in Norse mythology as many people in Valhalla were cheering for him.[71]
  • Issei is said to be particularly good with children.[72]
  • Noted by Azazel, Issei gets non-human girls, and girls with strange personalities to like him.
  • According to Rias, Issei is the type of man that is liked by older women.[73]
  • According to Ddraig, Issei is the first host he has fun making conversations with.[74]
    • Issei is also the first host to treat him as a single entity rather than a tool.[74]
    • Ddraig also considers Issei to be his favorite host in history.[75]
  • Issei's contract requests as a Devil tend to be with eccentric clients, such as Mil-tan and Morisawa.[76]
    • According to Rias, Issei is the first devil she has encountered, to have received favorable feedback from a client despite having not fulfilled his contract.[77]
  • According to Azazel, Issei has the most affection for his comrades among the Gremory peerage.[78]
  • Issei's true nature and rulership mentality is the path of righteousness, as opposed to that of Ravel, whose true nature is the path of supremacy and to control the world through military force.[79]
  • Issei has a strong sense of responsibility, which causes him to take responsibility for any unfavourable situations that occur around him, regardless of whether he is at fault or not.[80]
    • For this reason, he gave up on fishing despite his love for it, after he mistakenly destroyed his father's favorite fishing rod.[80] However, he regained his passion for fishing later on.[81]
  • Issei's key words are guts, effort and peace.[82]
  • His favorite type of cake is cheesecake.[83]
  • Issei is the only person outside of the members of the Slash/Dog Team that is allowed to read Vali Lucifer's Black History Diaries.[84][85]
  • Issei has a tokusatsu show in the Underworld called Breast Dragon Emperor Oppai Dragon (乳龍帝お(っぱいドラゴン)), which stars him as the main character named Issei Gremory and it is considerably popular among the children.
  • Issei makes review videos for Oppai Dragon products while acting as the "Oppai Dragon" himself and uploads them to DeviTube. This caused the merchandises' sales to increase.[86]
  • His perverted nature appears to be inherent among the Hyoudou Family, as Gorou, Miki, Juzo, and grandmother are erotic to some extent too. Gorou and Juzu both wanted harems too when they were younger; Miki taught Asia about naked aprons; while his grandmother teased Issei about him and Asia haing sex, then having a child. But, his has perverted nature has surpassed all of them.
  • Issei is a fan of Dragon Ball (Drag-so Ball in the Anime and Manga) and Gundam.
    • His favorite song is the intro of Dragon Ball.[87]
    • He sometimes likes to create Gundam plastic models when he has personal free time.[88]
  • Issei has loved robots and space battleships since he was a child.[89]
  • According to Kiryuu, Issei is well endowed, as she believes that he can satisfy both Asia and Rias with his size.[91]
  • Issei has a secret stash of his porn collection that he kept perfectly hidden within household goods inside the closet located in an unused room, he was surprised to hear that some of the girls not only found it but also have been watching them.[92]
    • According to Motohama, Issei's favorite eroges are ones that focus on princesses and girls from socially high class families. Issei speculates that his taste must be influenced due to his feelings for Rias.[93]
  • Issei has broken off all the engagements of the female characters placed into one (Rias, Kiyome, and Rossweisse), the first two of which have fallen in love with him as a result.
  • Despite being viewed as talentless, Issei has a number of different skills that surprised others:
    • Issei is shown to be a talented sculptor as he was able to create a perfect clay replica of Rias.[94]
    • Issei is good at sewing, as he was able to sew together headbands for the entire Occult Research Club in preparation for the dodgeball tournament.[95]
    • Issei is good with computers and video creation and editing.[86]
    • Issei is very good at giving massages, so much so that it's too erotic for women.[96]
  • Issei has a strange reaction to alcohol, as he becomes more serious and shy when drunk.[97]
  • Issei is the only man in existence to have seen Gabriel in a bikini, as well as the most beautiful women in all of Heaven who serves under her; in an old school swimsuit, transparent negligee, and athletic clothing.[98]
  • Issei's first-ever meeting with Asia may have been foreshadowing to the relationship between Cleria Belial and Masaomi Yaegaki, as at first, Issei and Asia similarly to Cleria and Masaomi, were forbidden from seeing each other in the same town; Kuoh Town due to the Devil's side and Angel's side still at feuds with each other.[101]
  • Issei is being supported by the New Satan Lucifer faction due to the fact that he is Sirzechs Lucifer's future brother-in-law, as they hope to boost his political influence and bring him into their faction.[102]
  • After the Hell Disaster and the defeat of the Alliance of Hell, Issei is considered as a potential candidate for the new Satans.[103]
    • Sirzechs wants to create a new seat for Issei under the title Satan, as in the Revelation of Apocalypse, it is recorded that the terms of Satan and dragon were synonymous, which suits Issei as he possesses the flesh of Great Red who appears in the Apocalypse. Sirzechs also wants to bestow his title of Crimson Satan to Issei.[104]
  • Issei is one of the protagonists of the erotic doujinshi called "Prince x Beast" alongside Yuuto Kiba, that the Kuoh Academy Manga Club produces, as it is based on the misunderstanding that the female students have about Issei's and Yuuto's relationship, with the manga being popular among the female students of the academy.[105]
  • Issei's appearance is based on Kazuma Torisuna from s-CRY-ed because the author is a fan of the series.
    • According to the author, his image is also inspired by the transforming heroes from Kamen Rider.[106]
  • In the Light Novel, Issei's Dragon arm is depicted as a scaly Dragon arm that covers his entire left arm, while in the anime, his Dragon arm is replaced by the Boosted Gear.
    • The manga depicts Issei's Dragon arm as a combination of both.
  • Supposedly, one of Issei's power-ups was to involve sucking Rias' breasts. Unfortunately, that was already too much for Fujimi Shobo, so the author resorted to something else.[107]
  • In the anime, Issei shows symptoms of PTSD and trust issues thanks to Raynare.
  • In the short story "25 (Twenty Five) at the Clubroom with Rias-buchou!", Issei was stated to have black hair; however, the anime and light novel illustrations portray him as having brown hair.
  • Issei was originally envisioned with Kiba's character traits but later changed into a pervert because Ishibumi felt those character types were too "weak" for the main character.
    • He is also the third character Ishibumi conceived of as the main character for the novel.[106]
  • Issei was originally going to be just a human who helps Asia.
  • Issei is Ishibumi's third main protagonist, with the first being Mitsuya Kanzaki and the second being Tobio Ikuse.
    • Issei is described to be the exact opposite of Mitsuya, for mostly unknown reasons other than the latter having a desire to see the world in despair.
  • In the English dub, Issei’s nickname Oppai Dragon is Grabbin Dragon.
  • His seiyū, Yūki Kaji, eventually married Ayana Taketatsu, the seiyū of Koneko, on June 22, 2019.
  • In the "DxD" popularity election, he came in 2nd in the all-character category, 1st in the male character category, 1st in the coupling category with Rias, 2nd with Akeno, 3rd with Asia, 4th with Yuuto, 6th with Koneko, and 7th with Ravel. In the best bout category, his bout with Sairaorg (Volume 10) won 1st place, his battle with Riser (the climax of Volume 2) was chosen as the 2nd best bout, his first battle with Vali (Volume 4) was selected for 3rd place, the decisive battle with Rizevim & Diehauser (Volume 20), which he challenged together with Vali, was selected for 4th place, his second confrontation with Saji (Volume DX.4) was selected as the 5th best, his first battle with Shalba (Volume 6) came in 6th place, and his second battle with Cao Cao (Volume 12) was selected for 7th place.[108]


  1. Light Novel Volume 5, Life.3 Cat and Dragon!, Part 3
  2. 2.0 2.1 2.2 Light Novel Volume 2, Life ∞ vs Power ∞ I Came to Keep My Promise!, Part 3
  3. 3.0 3.1 Light Novel Volume 12, Dimensional Gap
  4. Light Novel Volume 10, Life.2 A Maiden's Heart is Complicated
  5. Light Novel Volume 10, Life MAXIMUM VS Power : Crimson and Red
  6. Light Novel Volume 6, Life.2, Part 3
  7. True Light Novel Volume 2, Life.0, Part 3
  8. Light Novel Volume 2, Life.3, Part 6
  9. Light Novel Volume 7, Life.1, Part 3
  10. Light Novel Volume 9, Life.4, Part 5
  11. Light Novel Volume 12, Life.1, Part 1
  12. Light Novel Volume 2, Life.4, Part 5
  13. Light Novel Volume 5, Life.5, Part 2
  14. Light Novel Volume 5, WINNER, Part 2
  15. Light Novel Volume 10, Life.3, Part 7
  16. True Light Novel Volume 1, Life.5, Part 1
  17. Light Novel Volume 24, Life.5, Part 2
  18. Light Novel Volume 9, Life.4, Part 2
  19. Light Novel Volume 12, Life.1, Part 2
  20. Light Novel Volume 24, Life.5, Part 1
  21. Light Novel Volume 14, Life.4, Part 2
  22. Light Novel Volume 1, Life.2, Part 2
  23. Light Novel Volume 2, Life.4, Part 5
  24. Light Novel Volume 5, Life.3, Part 6
  25. Light Novel Volume 6, Life.4
  26. Light Novel Volume 11, Life.3, Part 1
  27. Light Novel Volume 20, Life.3, Part 5
  28. Light Novel Volume 9, Last.DxD Deep Red(Ani) and True Red(Otouto) —United Front—, defeating him using Infinity Blaster and Longinus Smasher
  29. Light Novel Volume 22, Life.5, Part 4
  30. Light Novel Volume 24, Life.5, Part 1, defeated him using Nyuutron Beam Cannon alongside Rossweisse
  31. Light Novel Volume 25, Life.DxD vs Life.GOD —Red Dragon—, Part 2, defeated him using Infinity Blaster, Longinus Smasher, Ascalon I and II
  32. True Light Novel Volume 1, Life.1, Part 3
  33. True Light Novel Volume 2, Oppai Dragon VS Switch Hime, I came to keep my promises!, using Infinity Blaster and Nyuutron Beam Cannon
  34. True Light Novel Volume 3, Life.4
  35. True Light Novel Volume 3, New Life
  36. True Light Novel Volume 4, Life.4
  37. True Light Novel Volume 4, New Life
  38. 38.0 38.1 Light Novel Volume 22, Life.5 Go, the Sekiryuutei Team!
  39. 39.0 39.1 Light Novel Volume 25, Life.DxD vs Life.GOD —Red Dragon—
  40. Light Novel Volume 20, Life.3 Hyoudou Issei
  41. Light Novel Volume 14, Life.3 Maverick Magicians, Part 3
  42. Light Novel Volume 19, Life.2 Various Decisive Battles!, Part 3
  43. True Light Novel Volume 3, Life.2 Kyoto and the Reverse Side of Kyoto, Part 3
  44. 44.0 44.1 True Light Novel Volume 2, Life.Friend VS Knight.Friend Hyoudou Issei and Kiba Yuuto
  45. 45.0 45.1 Light Novel Volume 4, Life.5 Welsh Dragon and Vanishing Dragon, Part 2
  46. Light Novel Volume 9, Life.3 The Group of Heroes has Arrived, Part 5
  47. Light Novel Volume 12, Life.1 Crimson Promise, Part 1
  48. Light Novel Volume 22, Life.5 Go, the Sekiryuutei Team!, Part 4
  49. Light Novel Volume 16, Life.4 Rizevim Livan Lucifer (The Son of the Morning Star)
  50. Light Novel Volume 17, Life.4 The Youth Devil, Part 2
  51. Light Novel Volume 12, Life.-2, Part 2
  52. Light Novel Volume 23, Life.3, Part 4
  53. Ishibumi's twitter
  54. Light Novel Volume 20, Life 3
  55. Light Novel Volume 24, Life.0
  56. Light Novel Volume 5, Life.2 The gathering of the Young Devils!
  57. Light Novel Volume 8, Extra Life. The Fun Gremory Family.
  58. Light Novel Volume 22, Life.3 Gremory’s Graduation Ceremony
  59. Light Novel Volume 22, New Life
  60. 60.0 60.1 60.2 Light Novel Volume 23, Life.Youth Because of this Youth
  61. Light Novel Volume 23, New Life
  62. 62.0 62.1 Light Novel Volume 24, Life.5 The Death God and the Hyoudou Family’s Breast Technique
  63. Light Novel Volume 25, Life.DxD VS Life.GOD Challenge to the Gods —Red Dragon—
  64. Light Novel Volume 18, Christmas
  65. Light Novel Volume 4, Life.4 The VIP Conference Begins!, Part 4.
  66. Light Novel Volume 12, Life.-2 Pal.
  67. Light Novel Volume 23, Life.3 Before the Decisive Battle
  68. Light Novel Volume 14, Life.3 Maverick Magicians
  69. Light Novel Volume 14, Life.2 The Rulers of the Late Night
  70. Light Novel Volume 16, Life.2 The Kins of the Dark Night
  71. Light Novel Volume 25, Life.3 The Battle at Yggdrasil
  72. Light Novel Volume 9, Life 3
  73. True Light Novel Volume 3, Life 2
  74. 74.0 74.1 Light Novel Volume 6, Life 2
  75. Light Novel Volume 11, Life...
  76. Light Novel Volume 13, Extra Life
  77. Light Novel Volume 1, Life 2
  78. Light Novel Volume 7, Life 2
  79. Light Novel Volume 22, Life 2
  80. 80.0 80.1 Light Novel Volume 20, Parents
  81. Light Novel Volume 23, Life.2 Dragon Attracts Dragon
  82. Ishibumi's Twitter
  83. Light Novel DX.5, Life 3
  84. Light Novel Volume 24, Life.2 The God of Death and the Dog of the Blade
  85. Light Novel DX.6, Life.6
  86. 86.0 86.1 Gremory of the DeviTube
  87. Light Novel Volume 3, Friends
  88. Light Novel DX.2, Life 6
  89. Light Novel Volume 24, Life 5
  90. Light Novel Volume 25, Life 0
  91. Light Novel Volume 3, Life.3 The Plan to Destroy the Holy-sword!
  92. Light Novel Volume 11, Life.1 Study and Mating Season?
  93. Light Novel Volume 18, Life.1 Even Devils Celebrate Christmas!
  94. Light Novel Volume 4, Life.2 Class visit Begins
  95. Light Novel Volume 3, Life.1 Life.1 Heat Up Occult Research Club!
  96. Fantasia Heroine Calendar Book 2014
  97. School Heroine
  98. Light Novel Volume 23, Upsetting sorcerer.2
  99. Light Novel DX.1, Life.6 Let's Go to Onsen
  100. Light Novel Volume 15, Episode Issei 2
  101. Light Novel Volume 18, Life.2 The Forbidden
  102. True Light Novel Volume 4, Bael
  103. True Light Novel Volume 4, Life 0
  104. Light Novel Volume 24, Secret talks
  105. Light Novel DX.2, Life.2 Student Council's Decision
  106. 106.0 106.1 Harem King Memorial
  107. Light Novel Volume 5, Afterword
  108. Dragon Magazine May Issue 2021