Gou Okada

Gou Okada is a fat, typical Otaku man who is part of the "comrades" recruited by Katsumata. Due to his appearance, he suffers an inferiority complex, especially against those who tease and ridicule him. His power is "Shinigami's Contract", in which the shinigami will kill anyone once that certain person has broken their "injunction" bounded to them beforehand, which they are usually tricked or swayed into by Okada. The shinigami is invisible to everyone but Okada and the people who broke a promise with him. He allows himself to be killed by his own "Shinigami's Contract" after Hirose absorbs the "Heart of Akuro" by revealing to her that he broke a promise in the past. The shinigami is seen after that though, crying, suggesting that it has a personality of her own, rather than being a personification of Okada's unconscious desire. (Source: Wikipedia)