Arc 12A New Captain and New Threats
After Aizen escaped and declared war, Shiraishi became acting captain of the Thirteenth Division and led its first battle in the World of the Living. As Aizen’s hunt for Fullbringers intensified, Masaki Kurosaki was cast out of the Ishida family and began investigating Shūkurō Tsukishima.
- Aizen escaped through a Garganta with Gin Ichimaru and Kaname Tōsen, while Shiraishi exposed his crimes and warned Yamamoto that Aizen’s next attack was unpredictable.
- Aizen transformed Loly with the Hōgyoku, ordered her to hunt Fullbringers and Soul King Fragments, and announced an all-out war against the Shinigami.
- Shiraishi trained Tōshirō Hitsugaya, arranged for him to succeed as captain of the Tenth Division, and accepted Jūshirō Ukitake’s request to lead the Thirteenth Division.
- Yamamoto appointed Shiraishi captain and ordered him to lead the opening battle, where Renji Abarai and Rukia helped the Thirteenth Division defeat invading Hollows.
- Kisuke Urahara extracted the Hōgyoku from Rukia and later warned Yamamoto that Aizen might be hunting Kūgo Ginjō for the Soul King Fragment inside him.
- Shūkurō Tsukishima attacked Morishita Hiroshi, altered his memories, and stole documents about a Fullbringer Cloning Project, while a gunman wounded Unagiya Kaoru.
- Shiraishi sought the Ishida family’s help to find Kūgo Ginjō, but Masaki Kurosaki’s aunt rejected his offer and Ryūken Ishida had Masaki expelled from their home.
- Masaki moved in with Isshin Shiba, then investigated the massacre linked to Morishita and met Kimura Keiichi, who asked her to help arrest Shūkurō Tsukishima.