Kosuke Kira Husbando

Kōsuke is sadistic, as evidenced by his cruelty towards his opponents and his massacre of frogs in his debut chapter. When Sōichi Natsume asks how he can't feel any empathy towards animals, his response is that he doesn't understand such value towards small animals. His lack of empathy, as well as his delinquent childhood, may be the result of living with his extremely abusive father, whom he is cowed by. However, the only person whom Kōsuke respects was his mother, and his father-figure, Togo. When Togo is killed by Yoshioka, Kōsuke went back to his insanity. It turns out behind his returning insanity after Togo died, in the same time he was nearly close to Yoko that it was revealed that Kira was possessed by the ghost of Yoko's deceased friend.Once he has been defeated and saved by Ryouta; at the same time Matthew Percier's crew arrived to rescue Kira and the other Btooom!'s "nominated" victims to escape before the Foundation's mercenaries arrived shortly to assassinate them. Kira regains his sanity while still having a mental breakdown in regards of what happened to his father figure, Togo.