Kaizen has been locked away in prison for 7 years after committing a horrendous crime: thievery. The police gave him parole with the condition that he would honor his title as the Ultimate Thief and use it for the greater good. Kaizen started off with petty thievery, but that only seemed to escalate. Throughout his life locked away, he has endured nearly everything imaginable to man. Now, all he has left is a twisted sense of humor and questionable morals left undiscussed.

Kaizen has a medium voice. After receiving minimal care in prison, he has become slightly weak which is reflected in his voice. He should sound rough and croaky, but not in the way which an elderly person would.