Regulus/Sabrina
I've just about reached my tolerance level regarding his belief that I'm somehow your thrall or under your spell. He's made it clear that no matter what I say he's only seeing what he wants. And while I'm certain I could win in a proverbial dick waving contest with him, it's not worth it.
I debated casting a few spells on him, but felt it best to use practical demonstrations since I had no idea if he was the type to react badly.
I don't need magic to win at billiards. Ambrose taught me to hustle people for money.