Gin Ichimaru (市丸 ギン, Ichimaru Gin?) is a fictional character and a major antagonist in the anime and manga series Bleach created by Tite Kubo. He is the captain of the 3rd Division in the Gotei 13 until he betrays Soul Society, and after that he becomes a commander in Sōsuke Aizen's arrancar army. His lieutenant was Izuru Kira.

Source: Wikipedia