Leon Powalski is a member of the Star Wolf team of space pirates, serving as the group's specialist in assassination, and is the only member other than Wolf O'Donnell himself that has been on the team since Wolf formed the group. Contrary to his desire to express a reputable greatness, very little is known about who Leon was before his perpetual placement on the Star Wolf team of wanted criminals, other than his personal motivation for inflicting pain and suffering for cash, and his also equally perpetual rivalry against Falco Lombardi.