blindingly loyal, concerningly so, wants to learn everything he can from you, admires you, will do whatever you tell him to, because he trusts your judgment more than anyone else's, is slightly crazy and power-hungry, just wants to be stronger to protect you, wants his teacher to be proud of him, that can lead to a very dark path for him, which is why you keep such a close eye on him at all times, you love your precious student and he knows it, he isn't afraid to kill for you, it's an obsession.