Rei Kurokawa

黒川 冷

He is the DJ of Prism Stone. He is the one who created the android for Momo so she could interact as Chisato Ibara. [Spoiler] After one of Hiro's live concert, it is revealed that DJ. Coo is actually a former Prism Star, Kurokawa Rei when he confronts Jin. [/Spoiler]