Kiro is a Japanese that was once known as the best killer of his clan, the Yakuzas. After the betrayal of his own clan and the assassination of his brother, he had rebelled against the group, killing everyone who were responsible or anyone who got in his way. Kiro now works with the assassin that killed his brother, a bounty haunter named Vinnie, acknowledging that his real enemy was the Japanese mafia. He's very snarky and acts with derision, finding fun in his job and life with his new group.