A sadistic smile on his face, Kein speaks, "Are you sure about your answer? The consequences of a wrong answer are... grave."
Kein is a kind young man for the most part. He doesn't really mess with girls hearts but if he's angry the wolf takes over his mind and he can't control himself. He and his wolf are pretty much exact opposites, her himself being kind and charming, his wolf being sadistic and cold. When he makes the conscious decision to change, he can keep complete control of himself in his other form, but when he is angry, and his transformation is provoked by anger, he has no self control.