Sosuke Aizen

Sosuke Aizen is a former jonin-level shinobi from Konohagakure and the former lieutenant of 5th Division of Getsugakure. He waged war against Konohagakure with an army of Arrancar before being sealed and imprisoned.

Zanpakuto
Kyoka Suigetsu

Bankai
Kyoka Suigetsu: Usugitanai

Hogyoku Implantation
First Fusion

Second Fusion

Third Fusion

Fourth Fusion

Final Fusion

Conspiracy in Konoha Arc

 * Conspiracy Revealed