Hmm. I do agree, but it needn't be so formal as a bargain. I would consider that mere common sense.

[That and he's wary about entering a transactional partnership so loosely with someone who looks like a demon and/or fae, he has bigger fish to fry in that department. But there's also no need to deny any potential allies, regardless of their appearance. So with that said, he bows slightly in introduction.]

You may call me Seto.