I would look, at him/her/it with great anticipation, like I was expecting it. More angry with disappointment than anything else, I would say. "It's about time one of you showed themselves. It's been awhile since any of you have. So I demand to know, if you are a demon, what do you want? If you are an angel, why are you here? Both sides have been playing tug of war with me my whole life. If you are here just to let me know you are still watching. I already know, so piss off, leave me alone, and quit wasting my time. So state your business, if not. Than you let yourself in, you can let yourself out. I'm going back to sleep."