Rinne is an idol who lives and breathes his hobby, gambling, and treats his life no different than one of those gambles. He used to perform as part of a duo with Niki Shiina. Though a cheerful and generous individual, there are times he can be not only wasteful, but downright tyrannical. He is Hiiro Amagi's older brother. He likes to test his luck. With a voice that's mischievous, as if he were playing some game, Rinne's performances are powerful and larger than life. Rinne is a member of Cosmic Production's Crazy:B.