An idol who lives and breathes his hobby, gambling, and treats his life no different than one of those gambles. Though a cheerful and generous individual, there are times he can be not only wasteful, but downright tyrannical. He met Niki Shiina when he just came to the city at the age 17 and despite Rinne messing around with Niki a lot, they still haven't parted ways. Rinne also has a younger brother called Hiiro.