Summary[]
The leaders of the Three Factions meet to discuss Kokabiel's recent attack on Kuoh Town as well as the current state of the Three Factions. However, the conference is ambushed by the members of the newly-revealed Khaos Brigade, who attempt to kill the members of the Three Factions.
Prelude[]
Due to Kokabiel's attack on Kuoh Town, the leaders of the Three Factions agreed to meet and discuss the recent attack as well as the state of the factions such as Azazel and the Grigori recruiting Sacred Gear possessors, but not attacking Angels or Devils. Azazel offered to sign a peace treaty with Heaven and the Underworld with Michael and Sirzechs agreeing as more conflict between the three would destroy the Three Factions. Just as the three leaders seemed to reach an agreement, the space around them seemed to be enveloped in a strange sensation, with it revealed to be Gasper's time-stopping ability, freezing nearly everyone except the faction leaders, Grayfia, the Two Heavenly Dragons, Rias, Yuuto and Xenovia.
History[]
In order to rescue Gasper, Rias and Issei transferred to the club room by performing Castling and swapping out Rias' Rook piece that was left behind in the club room.
As Issei and Rias transferred, a teleportation magic circle appeared as Katerea Leviathan emerged from it. Declaring that the Old Satan Faction had allied with the Khaos Brigade, Katerea stated that the era of Sirzechs, Michael and Azazel was over as she would kill them and replace Serafall as the Satan Leviathan. Laughing at her, Azazel challenged her to a fight as Sirzechs ordered Yuuto and Xenovia to defeat the attacking Magicians while he and Michael maintain the barrier and Grayfia analyzes the transfer magic that the magicians use. As Yuuto and Xenovia were dealing wit the magicians, the battle between Azazel and Katerea intensified, with Katerea drinking Ophis' snake in order to enhance her power and Vali Lucifer revealing his affiliation to the Khaos Brigade, attacking Azazel from the side.
Meanwhile, Issei and Rias managed to locate Gasper, where they were attacked by female Nilrem Magicians, who Issei and Gasper managed to defeat by combining Gasper's time stopping ability and Issei's Dress Break. As Rias and Issei tied up the Magicians, they made their way back to the main battle.
As Vali revealed his reason for betraying Azazel, Vali revealed his origin as both the White Dragon Emperor and the descendant of Lucifer. Katerea moved to continue her fight with Azazel, but Azazel revealed his artificial Sacred Gear; Down Fall Dragon Spear and its Balance Breaker; Down Fall Dragon Another Armor. Mutually attacking each other, Azazel pierces Katerea with his spear of light, severely injuring her. Realizing she was outmatched, Katerea attempted to kill Azazel by wrapping her elongated arms around him and activating a self-destruct spell. Azazel cut off his own arm to avoid the self-destruct spell, releasing his armor.
With Katerea, Vali stated that he was disappointed that Issei was his rival due to Issei being a mere human who reincarnated into a Devil while Vali was a descendant of Lucifer, thus rendering their rivalry one-sided in Vali's favor. Vali taunted Issei about the fact that he would kill Issei's parents in order to make Issei an avenger. Enraged, Issei was able to activate his Scale Mail with the armlet that Azazel gave him. Issei lunged at Vali with his Ascalon blade in order to slash him but Vali evaded his attacks and struck Issei with his fist and Divided Issei's power. Issei charged forward once again, as he grabbed onto Vali and used his Transfer ability to overload Vali's stealing and emission ability, thus paralyzing Vali before punching him with his fist which was enhanced by Ascalon, thus destroying Vali's Scale Mail armor. Vali rebuilt his armor, as he became excited due to Issei putting up a fight.

Realizing that he was at a disadvantage, Issei took a discarded jewel from Vali's destroyed Scale Mail armor and implanted it into his right gauntlet, nearly destroying himself in the process, but in the end he managed to assimilate the power; thus creating Dividing Gear, a White Dragon Emperor version of the Boosted Gear gauntlet.

Issei and Vali clashing in their respective Scale Mail armors
Becoming impressed by Issei managing to assimilate his power, Vali used Half Dimension to halve his surroundings. Azazel approached Issei and told him that if Vali is serious, he could halve Rias' breasts. Becoming further enraged, Issei's anger fueled his power allowing him to continuously Boost his power to an overwhelming degree. As Vali attempted to attack Issei, Issei was able to intercept him and launched a continuous flurry of attack as he stated his desire to protect the breasts of the female members of the Occult Research Club. Recovering from the flurry of attacks, Vali was able to resist Issei's attempts to Divide his power due to Albion analyzing his power. Due to Issei's impressive effort, Vali debated with Albion about using Juggernaut Drive, as he started to recite its chant before being interrupted by Bikou, who came to retrieve Vali. As the two escaped, Issei tried to stop them but was unable due to reaching his limit and the armlet's timer running out thus forcing him to release his Scale Mail.
Before leaving, Vali told Issei that they would clash again and more intensely as each of them would grow stronger.
Conclusion[]
With the battle concluded, the faction leaders were able to work out a peace agreement as they swore to not attack each other and work towards strengthening themselves so they would not be attacked by another mythology due to the knowledge of God of the Bible's death.
As a deterrent against the Khaos Brigade, the members of the Rias Gremory peerage were chosen to be team against their activities, in particularly Issei Hyoudou as the Red Dragon Emperor in order to rival Vali Lucifer, the White Dragon Emperor. In order to increase their growth and power, Azazel became a club assistant to the Occult Research Club and a teacher at Kuoh Academy in order to be close enough to train them.
Participants[]
Three Factions[]
Name | Information |
---|---|
Rias Gremory's Peerage | The servant Devils of Rias Gremory. They attended the conference due to being involved in the Kokabiel incident. During Nimrem's attack, Rias and Issei went to save Gasper from the Magicians who captured him while the rest stayed behind to fight the oncoming Magicians. After Vali revealed his betrayal, Issei fought against him by using a armlet provided to him by Azazel which allow Issei to temporarily use his Scale Mail without a sacrifice. Initially being overwhelmed by Vali, Issei was able to to power up due to his anger over the possibility of Vali halving Rias' breasts, with Issei beginning to overwhelm Vali, thus forcing him to retreat. |
Azazel | The Governor General of Grigori. He attended the conference and hoped to sign a treaty with Heaven and the Satans so that the Three Factions wouldn't destroy each other. He fought against Katerea Leviathan, defeating her after revealing his artificial Sacred Gear; Downfall Dragon Spear. |
Khaos Brigade[]
Name | Information |
---|---|
Katerea Leviathan | The descendant of the Original Leviathan and one of the leaders of the Old Satan Faction. She attempted to disrupt the conference in hopes of assassinating the leaders of the Three Factions, specifically the New Satans such as Sirzechs Lucifer and Serafall Leviathan in hopes of taking their place as the Satans. She fought against Azazel but was overwhelmed by him due to his Artificial Sacred Gear; Downfall Dragon Spear, which enhanced his power as she was killed by her own self destruct spell, in a attempt to take out Azazel. |
Nilrem | The Magician Faction of the Khaos Brigade. They attack the conference in hopes of assassinating the leaders of the Three Factions. They were defeated by the members of the Gremory Peerage. |
Vali Lucifer | The current White Dragon Emperor and the descendant of the Original Lucifer. Originally Azazel's subordinate, he betrayed Azazel and joined the Khaos Brigade after receiving a offer from them which would allow him to fight stronger beings. He fought against his counterpart, the Red Dragon Emperor Issei Hyoudou, overwhelming him but Vali was later overpowered himself after Azazel was able to goad Issei's rage by stating that Vali would half Rias Gremory's breasts. Becoming excited by the fight, he attempted to unleash his Juggernaut Drive but was interrupted by Bikou, who came to retrieve him as the two teleported away. |
Trivia[]
- This event marks an end to the hostility between the Three Factions as they forge an alliance. The members would later attempt to forge alliances with other various mythological forces in order to avoid conflict and promote peace.
- In High School DxD NEW, this fight was slightly altered.
- In the Light Novel, Koneko went to the conference along with the rest of the peerage. In the Anime, she stayed in the club room to look after Gasper.
- In the Light Novels, Michael is accompanied by a another Angel as a escort. In the Anime, Irina Shidou is his escort as she discovers the reason for Xenovia's reason for becoming a Devil.
- In the Light Novels, Vali reveals his affiliation to the Khaos Brigade before Katerea is killed. In the Anime, he reveals it after Azazel kills Katerea.