Read more about Joker(Persona) at: Wikipedia

Official Site: Atlus

Joker is the protagonist of Persona 5, a 2016 role-playing video game by Atlus. He is a second-year high school student who gets expelled due to a false accusation of assault from a corrupt politician. As a result, he leaves his hometown and moves in with a family friend in Tokyo to serve a one-year probation. Following his transfer to a new school, he and a group of other students awaken to a supernatural power known as the Persona. Soon after, they form a vigilante group known as the Phantom Thieves of Hearts, whose purpose is to explore the Metaverse, a metaphysical realm consisting of the physical manifestation of humanity's subconscious desires, in order to remove malevolent intent from people's hearts.

Joker(Persona) has not been a contender in any CBUB matches.