The Hero Faction (英雄派 Eiyū-ha) was formerly the second-largest faction of the Khaos Brigade led by Cao Cao, the descendant of Cao Cao from the Chinese novel Romance of the Three Kingdoms and the one who betrayed Ophis. After their dissolvement during the Demonic Beast Riot, they were reorganized by Cao Cao, who was acting as Indra's vanguard, becoming the subordinates of the Hindu God.
The motto of the Hero Faction was to fight and defeat "evil beings" such as Devils, Fallen Angels, and Dragons that bring harm to Humans. The Hero Faction possessed a large number of Sacred Gear wielders who were either abducted and brainwashed, or followed willingly. Many of these members, however, were sacrificed in battle during the Hero Faction's attempts to force them to achieve Balance Breaker. All of those who didn't reach Balance Breaker were eventually captured and later died as a result of Ophis' snakes destroying their Sacred Gears, while those who did achieve Balance Breaker were called back before they could be caught.
The Hero Faction went inactive after the events of the Demonic Beast Riot due to the loss of their leaders. Indra sends their most powerful members (Cao Cao, Leonardo, and Georg) to the Realm of the Dead, taking all of their Longinus from them. Jeanne and Heracles were captured by the Devils and Fallen Angels for interrogation, while Siegfried was the only main member of the Hero Faction who died in battle.
The Hero Faction reformed during the Azazel Cup as Cao Cao once recruited its former members to form Team Spear of Heavenly Emperor. Due to Cao Cao acting as Indra's vanguard, the Hero Faction became Indra's subordinates. As a result of possessing great power, Indra offered the Hero Faction's cooperation to Team DxD, but due to their past crimes, they could only be added as provisional reserve members. Acting as a member of DxD, Cao Cao often acts alongside Tobio Ikuse's Slash/Dog Team, investigating events from the shadows.
|Cao Cao (Founder/Leader)||Georg (Sub-Leader)|
|The descendant of Cao Cao and possessor of the first and strongest Longinus; the True Longinus. He created the Hero Faction to challenge various supernatural existences and protect humanity from them, seeking to find out how strong Human beings can become. Currently serves as Indra's vanguard.||The descendant of Johann Georg Faust, the human who contracted with the legendary Devil Mephisto Pheles, as well as the possessor of the Longinus; Dimension Lost. Originally a top-class Magician from the Magicians association. He was later scouted by Cao Cao and left the association to join the Hero Faction.|
|The inheritor of the spirit of the Maiden of Orléans, Joan of Arc. She is the possessor of the Sacred Gear; Blade Blacksmith, which has the ability to create various Holy Swords with different elements.||The inheritor of the spirit of the Greek mythological hero, Heracles. He is the possessor of the Sacred Gear; Variant Detonation, which allows him to to generate explosions on anything he comes into contact with.|
|The inheritor of the soul of Connla, the son of the Irish mythological hero Cú Chulainn. He possesses the Sacred Gear; Night Reflection, which allows him to absorb attacks using shadows and redirect them in whatever direction he wishes from any shadow within the Sacred Gear's area of influence.||He is the inheritor of the soul of the demigod Perseus. He possesses the Sacred Gear; Aegis Mineralization, which has the ability to petrify people who are weaker than him. He wields a sword and a shield.|
|The descendant of Marsilio Ficino. He possesses the Sacred Gear, Dreamlike Curse, and its Balance Breaker, Palaselene Utopia, which has the ability to send a targeted individual into a barrier space of his creation (a seemingly parallel world).|
|Zhuge Liang||Momono Kibitsuhiko|
|The descendent of the general Zhuge Liang from the Three Kingdoms era. She possesses the Sacred Gear; Strategy Trap, which allows her to create any trap she chooses such as pitfalls or blocks. She joined the Hero Faction after proving herself during their recruitment audition.||He is the inheritor of the soul of Momotarou. Like the original he is accompanied by animal companions such as a Monkey Youkai, a Dog God Youkai and a raven. He joined the Hero Faction after proving himself during their recruitment audition.|
|Arthur Pendragon||Le Fay Pendragon|
|Descendant of King Arthur as well as Morgan le Fay as well as the brother of Le Fay Pendragon and wielder of the legendary Holy King Sword; Caliburn. Originally one of the two top swordsmen of the Hero Faction along with Siegfried, he later left the Hero Faction to join the Vali Team.||Descendant of Morgan le Fay as well as King Arthur as well as the sister of Arthur Pendragon and a high ranking Magician. Originally member of the Hero Faction alongside her brother, she later left the Hero Faction alongside her brother to join the Vali Team.|
|The Artificial Human created from the genes of the Dragon-slaying hero Siegfried in the Nibelungenlied. He owns the Sacred Gear; Twice Critical and a collection of Demon Swords including the legendary Demonic Emperor Sword, Gram. During the Demonic Beast Riot, he fought against Yuuto Kiba, who Gram chose as it's wielder. Siegfried was killed by Yuuto wielding Gram.||The possessor of the Longinus; Annihilation Maker. He was a member of the Hero Faction until the Demonic Beast Riot, where Shalba Beelzebub kidnapped him and forced him to create the large Anti-Monsters, Bandersnatch and Jabberwocky, which left him comatose. Currently at the Grigori, where he is being taught to control his Sacred Gear.|
|Staring Blue Possessor||Staring Green Possessor|
|An unnamed former member of the Hero Faction, who possesses the Sacred Gear; Staring Blue. He fought against the Gremory Peerage but was defeated and captured. He later died in custody due to Ophis' Snake breaking his Sacred Gear.||An unnamed former member of the Hero Faction, who possesses the Sacred Gear; Staring Green. He fought against the Gremory Peerage but was defeated and captured. He later died in custody due to Ophis' Snake breaking his Sacred Gear.|
|Flame Shake Possessor|
An unnamed former member of the Hero Faction, who possesses the Sacred Gear; Flame Shake. He fought against the Gremory Peerage but was defeated and captured. He later died in custody due to Ophis' Snake breaking his Sacred Gear.
- Practically almost every Hero Faction member shown wears matching uniforms similar to that of a Japanese school uniform (more specifically, the gakuran worn in the fall).
- The Hero Faction is the only faction of the Khaos Brigade that reformed after its dissolvement.
- In the afterword of High School DX4, Ichiei Ishibumi mentioned that most of the remaining Hero Faction members have readjusted their Balance Breakers to reach the Abyss Side.