Tsutomu Rokutanda (六反田 務 Rokutanda Tsutomu) is Ginta's cousin and a classmate of Arimi's. He has had a crush on her for a very long time. Tsutomu sees himself as Ginta's rival, and Arimi teaming up with Ginta to split Yuu and Miki frustrates him even further. In the anime, after Arimi's definitive rejection Tsutomu befriends a girl named Yayoi and they start dating. In the anime television series, Tsutomu Rokutanda is voiced by Kazunari Tanaka in Japanese and Tom Gibis in English.