>>6127183He taught Lucerne to fight muggle style. Has killed a dragon with a sniper rifle. Beat up a few werewolves bare hand. Instructs a class where most kids could just blow him away, yet he is still useful. Yeah, I would not fuck with the assistant teacher for DADA if I were you, he is a super nice guy till he gets pissed off... but then? You saw what happened when he had a headache...don't make him mad.
Picrel.