He appears friendly, but he's actually very selfish and two-faced. Anything surrounding this sadistic idol is always at his mercy. He uses his handsome, beautiful face to his own advantage. Due to his brutal childhood, Kou can easily switch his cheery and easy going usual appearance of a superficial person and an idol, to a vicious and very cruel merciless vampire who doesn't understand at all, the very meaning of love. Thinking that all of the humans are vile creatures.