Names and nicknames are something he could arguably find easily, but I leave it up to you whether he has any idea there's a sadistic killer beneath the little girl facade. He's not stupid enough to believe the child wonder theory, though.
Go ahead and pick. I'm playing the concept for humor, you can join in or play things straight. Totally up to you.
Same goes for everyone else too. Through someone
is going to get hugged and called dragy which may be an awkward moment till I know how Harald is going to play things.