Recaps

Su Yang recruited Sairaorg for the Protector Squad and confronted the Underworld’s old guard over Sona’s ambitions and his squad’s authority. He exposed and destroyed the Naberius family’s criminal operations, then subdued Anthony as the leaders affirmed his mandate, leaving Falbiwen Asmode’s response pending.

• Su Yang reunited with Jeanne, finished his exams with the Academic God Halo, and traveled to the Underworld with Rias, where Sona joined him.
• Su Yang met Sirzechs, proposed Sairaorg, Rinte Seran, and Vali as Protector Squad recruits, and won Sairaorg’s allegiance after a fistfight.
• At the Underworld gathering, Sairaorg and Sona set out their ambitions, and Su Yang silenced Devils who mocked Sona’s plan for an inclusive Rating Game school.
• The leaders arranged exhibition matches, and Theodora challenged Su Yang over Sona and the right to compete for the Sitri family’s Next Head.
• Su Yang presented evidence against Lauren Naberius, exposed the family’s underground experiments, and used the Underworld Great Array to eliminate Lauren and other guilty members.
• Su Yang revealed Anthony Androsia’s crimes, overcame his attack, and handed him to Grayfia as Sirzechs, Ajuka, and Serafall affirmed Su Yang’s authority while Falbiwen Asmode’s response remained pending.

Su Yang subdued Nyx, rescued Ingvild, and prepared for Theodora’s betrayal while strengthening his ties with Sona and his allies. The teams entered Ajuka’s Exotic Space for their match, where Su Yang sealed the exit and went to face Loki and Fenrir alone.

• Su Yang judged the Underworld’s suspects, accepted a proposed match against Dihauser Belial, and reprimanded Kisesu Itsuo and Diorio for their behavior.
• Su Yang arranged for Sairaorg to train Raiser, then made Rebel his Servant with a golden Familiar Chess Piece that could evolve her bloodline.
• Nyx and Ingvild invaded Tanning’s territory, where Ingvild’s song suppressed the defenders until Su Yang defeated and sealed Nyx, freeing Ingvild from brainwashing.
• Su Yang warned Ajuka that Lee Zevim had to be killed before he could summon Beast Emperor 666, and Grayfia cautioned him that Theodora might have allied with outside forces.
• Su Yang reincarnated Ingvild with a golden God's Familiar Chess Piece, curing her sleeping sickness and making her his Servant.
• Su Yang and Sona discussed Theodora and their relationship, while Sona asked him for compensation and Serafall interrupted them.
• Su Yang and Sona prepared for the match against Theodora, and Grayfia transported both teams into Ajuka’s Exotic Space after warning Su Yang not to kill him.
• Su Yang sealed the route out of the Exotic Space, left for the central battlefield in Kurma Incarnation: Overlimit, and faced Loki as the system challenged him to withstand Fenrir’s attack.

Su Yang defeated Loki, Lee Zevim, and Durumado, but the battle left his origin irreversibly damaged. While recovering in the past with Grayfia, he met her younger self and offered her a chance to leave the Underworld with him.

• Su Yang killed Loki, then fought the Holy Grail-revived Evil Dragons while Tiamat and the others protected Sona from Lee Zevim.
• Su Yang used the Heaven Great Array and Underworld Great Array to destroy Durumado, but the effort irreversibly damaged his origin before he escaped Lugatium with Grayfia.
• Su Yang and Grayfia arrived in the past, where he recovered in a hidden cabin as young Grayfia trained and challenged his ideas about devil families and their traditions.
• Michael visited Su Yang, who refused to return to Heaven but accepted knowledge from it before seeking Great Red in the Dimensional Rift.
• Su Yang showed Great Red his battle with Durumado, learned the coordinates of his own time and space, and promised to break the fate that would kill her.
• Su Yang stored their residence in his Fish Avatar and left with Grayfia, then turned back to rescue young Grayfia from a Maou-class devil.
• Su Yang invited young Grayfia to travel with him, but she hesitated because she felt responsible for defending the Underworld, so he urged her to reconsider the Old Maou Faction.

Su Yang traveled into the past, sealed Beast Emperor 666, and helped Saint defeat the Four Great Satans before trying to change the future that would kill her. He crossed the universe’s timeline with Saint, but emerged in Kyoto separated from Grayfia and met Yasaka.

• Su Yang traveled with Grayfia and her younger self to the ancient battle between the God of the Bible and Beast Emperor 666, where he healed Saint and decided to fight the Beast Emperor.
• Su Yang forged a Golden Sword and, with Saint’s power and the Heaven Great Array, sealed Beast Emperor 666 and remained in the past without being rejected by spacetime.
• Su Yang and Saint agreed to stay together, but he later took her place in battle and used the Heaven Great Array and Excalibur to destroy the Four Great Satans.
• Su Yang gave Esther the Awakening Stone, while Saint completed the Twilight Holy Spear and chose to stay behind as the younger Grayfia returned to her own time.
• Su Yang crossed beyond the universe with Saint and swallowed the DXD universe as Matsya, letting Little Ju alter its worldline so Saint could reach the future.
• Saint entered the Spacetime Corridor with Su Yang, while Michael, Ajuka, and Sirzechs discussed Su Yang’s use of the Heaven Great Array and the threat of enemies from other worlds.
• Yasaka found Su Yang in Kyoto after Kokonoe brought him home, recognized him as the missing captain, and decided to notify the Devils before Su Yang woke and asked where he was.