His name is Jack Napier. He was a Joker and caused complete chaos during the events of "Death of family" and "Endgame". However, he lost his memory after that. During Bloom's attack, he gets a job as a butcher and tries to live a new life. However, he feels that he has changed a lot and therefore often thinks about suicide. He is a modest and awkward guy who loves jokes. Not all of his jokes are successful. He doesn't know that he was a Joker. Sometimes he talks too much.