Sixteen year old Yokosuka Jou, nicknamed Joe is one of the seven protagonist of RAINBOW. He has been detained for 2 years for violence after being forced to have intergender relationships. He inflicted injuries requiring three months of recovery on the person who attempted to violate him.

Joe is weak by nature. He offered Sakuragi a cigarette in the first day to beg for mercy as Sakuragi took all six of them on in a fight started by Mario.

He has a younger sister named Megumi.