3rd Division; Captain Ichimaru Gin
The sly-faced, perpetually smiling Ichimaru seems to be almost totally amoral, willing to injure even his own comrades if it helps him get what he wants.
Ichimaru's personality is inscrutable. It is impossible to tell if his ever-present grin is merely a facade to hide his true thoughts, or if he really does take devilish glee in the various tragedies he sets in motion.
As with most captains, Ichimaru's past is shrouded in mystery. However, he seems to have a rather strong relationship with vice-captain Matsumoto, who is probably his only true friend.
Ichimaru's zanpaku-to is Shinsou, which he uses with impressive skill, if rather indiscriminately.