Gin Ichimaru

The smiling Squad Three captain whose betrayal hid a plan to kill Aizen.

Gin Ichimaru is the former captain of Squad Three in Bleach, and formerly Sousuke Aizen's lieutenant in Squad Five. He keeps his eyes perpetually narrowed to slits, a practice since childhood, and maintains a smile that gives him the resemblance of a snake. With Aizen and Kaname Tōsen, the captains of squads Five and Nine, he defects from the Soul Society at the time of Rukia's rescue. His betrayal of the Soul Society is later revealed to have been a ruse to get close to Aizen, whom he attempts to kill; Gin fails and dies instead.