Joker 조커
Height 201 cm
Affiliation: Sabbath Crew
He's the undefeated champion in the underground cage fights scene. He seems to be doing it for the money to take care of his family. It is unknown how many siblings he has or if their parents are around but we know he has at least one younger brother, who went behind Joker's back to work at a construction site. He is protective over them, not wanting them to work, assumably in order for them to focus on getting their education.
He's mostly shown working closely with Wooin and are often seen together. It is assumed that they are good friends.