Arc 9A Changing Seireitei
After Shuichi helped end the Reverse London battle, the Gotei 13 turned to rebuilding and a new generation of leaders took shape across Seireitei. The arc ended with Sōsuke Aizen assigned to the Fifth Division and Shinji Hirako reluctantly appointed lieutenant of the Ninth.
- Shuichi killed Momotaro, and the defenders routed the remaining attackers before the Gotei 13 left Reverse London’s affairs to the Dragon Management Organization.
- Yamamoto heard that Shuichi’s new Bankai obscured his position and Reiatsu, while Central 46 debated the changing balance of power and fallen nobles recruited Yushima Ouko for a secret project.
- Yoruichi brought Kisuke Urahara to the Shihōin estate, and Shuichi later taught Hakuda, Kidō, and theory at Shin'ō Academy as Kisuke enrolled.
- Unohana became captain of the Fourth Division, Minamoto Yishou took command of the Eleventh, and several other divisions began preparing successors and new instructors.
- Zaraki met a nameless girl in the forest and named her Yachiru Kusajishi, while Okuharano appointed the directionally challenged Raia as his assistant.
- Central 46 traced suspicious noble payments to Yushima Ouko, whose secret experiments continued in a hidden Rukongai workshop under Onmitsukidō surveillance.
- Graduates received their assignments as Aizen Sōsuke entered the Fifth Division, Hachigen Ushōda joined the Kidō Corps, and Lisa Yadōmaru and Rose Ōtoribashi received their placements.
- Jūmonji Quando appointed Shinji Hirako lieutenant of the Ninth Division after judging him the most qualified candidate, though Hirako continued to leave paperwork unsigned.