Arc 14The Search for Kaien’s Killer
After Aizen’s assault on the Soul King Palace left the realms collapsing, Shiraishi was stranded in Soul Society and became a fugitive after killing Hasegawa Taizo. He settled in West District Ten, crossed paths with Unohana and Isane, and joined Kūkaku Shiba in investigating Takehiko Tsunayashiro’s possible role in her brother’s death.
- Yoruichi Shihōin supported Sajin Komamura against Kaname Tōsen, while Aizen announced that he would attack the Soul King Palace.
- Aizen reached the Soul King Palace, killed the members of Squad Zero, and used the Soul King’s power to open a new world.
- As the three realms trembled, Kisuke Urahara began preparing to make Kūgo Ginjō and Jūshirō Ukitake the Soul King, while Aizen gathered followers and selected people for his new world.
- Stranded in the disrupted Dangai, Shiraishi and Yamamoto lost contact with Soul Society as the surviving captains prepared to leave the ruined Seireitei.
- Soi Fon confronted Shiraishi over Hasegawa Taizo’s death, but he wounded her and escaped before she could track him.
- Shiraishi sought shelter with Kūkaku Shiba, where he witnessed Kaien’s funeral and learned how the Hollow had consumed Kaien’s spiritual body.
- After Kūkaku sent him away, Shiraishi settled in West District Ten through Ichirō Yagyū and agreed to kill Hollows for Kawakami Saburō.
- Shiraishi met Retsu Unohana and Isane Kotetsu while pursuing Hollows, then joined Unohana’s search for Dragon Lantern Fungus and encountered Kūkaku, who suspected Takehiko Tsunayashiro had stolen her brother’s body for a Hollowfication Experiment.