When he was a member of the Gotei 13, Aizen appeared as a mild-featured man with brown scholarly hair enhanced by square glasses, along with soft brown eyes. He wore the standard Shinigami uniform with a capt… See more

Aizen is a polite, soft-spoken intellectual, often addressing his subordinates by their given names. He rarely … See more

Soul Society arc Arrancar arc
From there, Aizen changes his clothing style to resemble the Arrancar, and begins to create several Arrancar. At some point, he finds Coyote Starrk and Lilynette Gingerbuc… See more

•Hōgyoku (崩玉, Crumbling Orb; Viz "Breakdown Sphere"): Aizen has stated he arrived at the conclusion of the Hōgyoku before Kisuke Urahara, though it ended in failure.[179] In order to finalize the Hōgyoku, t… See more