Ava
Hello, we haven't met but I've heard quite a bit about you from my bosses. I'm a demon I'm sorry to say since I think that will get us off on the wrong foot. Before you ask, no, I'm not writing you to threaten you or try to trick you into selling me your immortal soul. Souls get really boring to collect after awhile, they're just sort of useless incorporeal things, and then you send them to Hell and never see them again so what was the point anyway other than networking and looking good for the boss? So don't worry about any of that.
What I do want to do is make a business arrangement. You've got that lovely demon-controlling power everyone's so scared of you for. I'm asking you not to use it. Something's going to happen soon, big things moving and shaking in Kansas, and I want you to stay out of it. Don't warn anyone, don't try to save anyone, and all around no heroics. If you do that, wait it out, I'll tell you which demon killed your fiance. You will be quite welcome to use your power on him, of course.