Recaps

Duanmu Huai protected Naruse Mio from the Devils targeting her, helped Rias defeat her engagement, and established an Inquisition stronghold with Mary. When Mio returned to the Demon Realm to face her family, Duanmu Huai destroyed Belphegor and warned the Devils not to threaten her again.

• Maria explained that her contract spell had reversed the master and servant roles, and Duanmu Huai stopped Naruse Mio’s curse by making her submit.
• Duanmu Huai bought a villa for Naruse Mio and Maria, where they destroyed a Rogue Devil before he arranged for Mio to attend Komaou Academy and Rias to help her.
• Duanmu Huai accepted Rias’s temporary contract for the Rating Game, then helped her defeat Raiser and publicly identified himself as the Grand Inquisitor of the Inquisition.
• Mary Clarissa Christie arrived, joined the household and Inquisition, and helped Duanmu Huai establish a stronghold in the former Fallen Angels’ church.
• After learning that Wilbert Family members wanted to meet her, Naruse Mio chose to return to the Demon Realm with Duanmu Huai at her side.
• Duanmu Huai attacked the Wilbert castle after Lucia sent armed maids against him, then confronted Ramsus over leaving Mio unprotected.
• When Latine attacked Vilda City and demanded Naruse Mio, Duanmu Huai destroyed the Heroic Spirit Colossi and killed Latine and Belphegor, whom he classified as Xenomorphs.
• Duanmu Huai warned Sirzechs that the Inquisition would act again if the Devils repeated their behavior, then told Ramsus he had wiped out the Xenomorph Demons in Belphegor Territory.

Duanmu Huai brought Naruse Mio into the Inquisition, guided the Wind Music Club through auditions and competitions, and helped its members face personal choices. When an Antarctic expedition uncovered a Xenomorph outbreak and a passage to another world, Duanmu Huai destroyed the infestation and the world beyond, leaving Rias and the others shaken by the Inquisition’s power.

• Sirzechs, Serafall, Ajuka, and Falbiuim agreed to blame Belphegor Territory’s destruction on an ancient relic after Duanmu Huai defeated Belphegor, while Naruse Mio chose to join the Inquisition rather than inherit the Wilbert Family.
• Duanmu Huai ended seniority-based selection in the Wind Music Club, brought back former members, and ordered a public audition that resulted in Kosaka Reina earning the trumpet solo over Nakasako Kaori.
• Duanmu Huai helped Mizore Kaizuka and Nozomi Umbrella Tree resolve their misunderstanding, while Tanaka Asuka faced her mother’s pressure to quit the club and later returned after placing in the nationwide top twenty on a mock exam.
• After the Wind Music Club won a Gold Award and advanced to the National Competition, Duanmu Huai summoned Frieren to teach Naruse Mio, who began expanding her magical imagination through anime and games.
• Duanmu Huai intervened when Kiba Yuuto and Toujou Koneko confronted Balper and Kokabiel, killed Balper, and defeated Kokabiel before leaving Kiba and Koneko to face the consequences.
• Duanmu Huai took Mary, Naruse Mio, Rias, Frieren, and others to Antarctica to investigate vanished research teams, where they found a Xenomorph outbreak and a spatial passage opening beneath a research station.
• Duanmu Huai awakened an Emperor-class Titan, killed the monster emerging from the passage, then piloted the Titan through the gate and destroyed the Xenomorph world before Frieren sealed the passage.
• Rias and Naruse Mio recalled the destruction of the alien world, and Toujou Koneko admitted that Duanmu Huai frightened her while Mio defended him as a protector of humanity.

Duanmu Huai settled into his new role at Komaou Academy while establishing the Inquisition’s Star Fort and confronting Disobedient Gods and threats to his allies. After punishing Asia and defeating Athena with the Gorgon Sisters’ help, he left Athena alive with the Authority of the Earth Goddess.

• Duanmu Huai returned to Komaou Academy as homeroom teacher, reunited with Tachibana Rui, and helped her confront Ogiwara Shū over his affair with Tachibana Hinata.
• Duanmu Huai hosted the Four Sides Meeting, learned that gods were reviving and threatening the mortal world, and agreed the Inquisition would act when humanity was endangered.
• Rumiere arrived in her fighter and wrecked Duanmu Huai’s mansion, so Duanmu Huai summoned a Deathwatch Star Fortress and moved everyone into orbit.
• Duanmu Huai killed Mekal and Verethragna after they threatened Sardinia, then returned to school and pushed the Wind Music Club to hold repeated selections before competitions.
• Duanmu Huai saved Toujou Koneko from Black Song, equipped her with Battle Nun armor, and helped Rias’s team battle Sona’s peerage in the Ranking Competition.
• Diodora kidnapped Asia and used her healing power in a dangerous device, but Duanmu Huai and Frieren defeated the Old Demon King Faction attackers, killed Diodora, and freed her.
• Asia asked Duanmu Huai to punish her for saving Diodora, and he subjected her to an ordeal that made her experience harming an innocent family.
• Athena came to reclaim her Gorgon Stone, but Duanmu Huai shattered it and summoned Stheno, Euryale, and Medusa, who took the Authorities of Death and Darkness while Athena escaped with the Authority of the Earth Goddess.

Duanmu Huai and the students were summoned to Todas, where he established the Inquisition and led the fight against the Demon Kings. After killing Andariel and uncovering Belial’s infiltration of Caldeum, he destroyed Belial and left the desert kingdom’s capital in flames.

• Duanmu Huai led the students to Todas, rejected God Ehit’s failed summons, and learned that the Demon Race threatened humanity.
• Duanmu Huai established the Inquisition’s base near the Heiligh Royal Capital and sent Toujou Koneko and Naruse Mio to fight Blood Raven’s forces.
• Duanmu Huai transported Commander Merdle’s army to Rogue Encampment, where Naruse Mio and Toujou Koneko defended the camp from a demon attack.
• Duanmu Huai attacked Andariel’s monastery, killed her, and cleared the demons from Blood Moor.
• Duanmu Huai reviewed the students’ chosen roles and warned those seeking combat training that battlefield service meant killing.
• Duanmu Huai investigated the palace beneath Lut Gholein, killed Duriel, rescued Tyrael, and traveled through a portal to Caldeum.
• Duanmu Huai discovered that demons had infiltrated Kasin Outpost and freed Iron Wolf Captain Dafud and the other captives.
• Duanmu Huai exposed the demons controlling Caldeum’s guards, stormed the Royal Capital, and destroyed Belial after it revealed its true form.