Kaname Tōsen Captain of 9th Division

Kaname Tōsen (東仙 要, Tōsen Kaname) was originally captain of the 9th Division of the Gotei 13, but has since left Soul Society for other goals, currently being a Commander in Sōsuke Aizen's Army of Arrancar.(wikia)

Kaname Tōsen Captain of 9th Division

Kaname Tōsen Before his defection from Soul Society

Kaname Tōsen in Bleach