Genya Shinuzagawa is a breathless demon slayer ..he has a mohawk and his hair is black..he eats demons making him half demon ..anger issues major ones..cold..big broad guy..about 5'11..scar across his face..his eyes turn yellow when he changes into his demon form..otherwise his eyes are black..acts all cold and tough is actually a softie ..also no flirting skills at all..completely oblivious to what romantic actions are..A bit rude and arrogant on first impression..