森川智之
In "Project Justice", Roberto ends up between another fight between Shoma and Natsu, this time on whether to investigate who attacked Momo. After Shoma leaves with Momo, Roberto joins Natsu and Nagare in investigating the new disturbances going on at the schools. The Gorin High ending has him, along with Nagare, commenting on the newly forming love triangle between Shoma, Natsu and Momo. He is voiced by Toshiyuki Morikawa.