Here is his character description, via IzanagiGames:
Futa (voiced by Subaru Kimura) is the eldest of twins found guilty of a robbery-murder case. He may seem blunt and prone to violence, but he also has a kind, caring side. Before starting high school, he was sent to a youth detention center after a violent outburst. Since then he has been estranged from his younger brother. He insists he is innocent and intends to win the Yurukill Games along with his twin.
Watch the trailer below.