Kamui

神威

Kamui, also known as Saki Shibayama, is a System Debugger employed by CC Corp and serves as the leader of the Cobalt Knights.
In .Hack//AI Buster, it is revealed that she was once very clumsy and designed her avatar based on the previous leader, Albireo, whom she considered a mentor. Albireo was unknowingly responsible for her strong desire to maintain order within The World. This is why she has black hair and one gold and one blue eye like Albireo, as well as a replica of his weapon, the Spear of Wotan, in the novels and manga.
In AI Buster, the Cobalt Knights focus on hunting down and deleting Vagrant AIs rather than dealing with players like the Crimson Knights. Kamui treats the slightest offense with the same importance as all other laws, going so far as to track one of her own subordinates to discover they had been hiding a Vagrant AI from her simply because she questioned what they were doing.
In the anime, she is portrayed as someone who will delete anyone for the slightest law violation in public executions.