Arc 21The Fall of Aizen
Shiraishi and his allies launched a counterattack against Aizen and the Arrancar invasion, killing Aizen and ending the fighting with the Quincy. The story left Shiraishi back in Zuellni after a brief disappearance with Kūkaku, as Sora Inoue organized the rebuilding and the new calendar.
- Grimmjow led the Arrancar in a deceptive attack on the Dark Forest, while Gin Ichimaru suspected the Shinigami had survived and prepared a counterattack.
- Aizen named Jehovah the Zeroth Espada and sent her with a million Arrancar to invade the lower world, prompting Kisuke Urahara’s group to attack the Pantheon and defend the Steel Shell Cities.
- Shiraishi entered the Pantheon with his allies, confronted Aizen, and sent Byakuya Kuchiki and Tōshirō Hitsugaya to fight Zommari Rureaux and Loly.
- Ichigo Kurosaki fought Ulquiorra, suffered a fatal chest wound, then transformed and overwhelmed him while Mayuri Kurotsuchi trapped and tortured Szayelaporro.
- Aizen’s barrier isolated him from the others, and he fought Yamamoto, Ōetsu Nimaiya, Kisuke Urahara, and Shiraishi until Shiraishi used PROJECT’s hypnosis to help Gin Ichimaru stab him.
- Retsu Unohana defeated Baraggan but was gravely wounded, while Shiraishi burned Aizen until his Reiatsu vanished and Unohana began treating Nelliel.
- Shiraishi persuaded Tier Harribel to stop the fighting and helped secure a ceasefire between the Arrancar and Quincy, while Yhwach fell into a deep sleep and left affairs to Haschwalth and Uryū Ishida.
- Shiraishi attended the Shinigami Festival with Kūkaku Shiba, disappeared with her in early August, and returned to Zuellni by August fifteenth as Sora Inoue planned for the rebuilding.