Atsuro Kihara

VA: Atsushi Abe (Drama CD/Overclocked), Spike Spencer (English) Kazuya's childhood friend who is a computer savvy. Although a genius, he hardly has a studious personality and is very gregarious. He wishes to control the demons, erasing their threat and benefiting mankind. ~!In Overclocked during Naoya/Kaido 8th Day, it's revealed he has a crush on Yuzu.!~ Source: Wikipedia