"You are not! Please believe me when I say you are not! But no-one is allowed to know what I am. The dark Bastard would find out and would try to use it against all of us. Uncle Sev - Professor Snape that is, he's my Godfather - knows because he sees auras and magical signatures. He always knew what I am. And he knew the moment he saw you, what you are to me. I have to play the role, otherwise you're in more danger than you already are. 