u/ExceedsTheCharacterL

I never thought the show would go in this direction, but I don’t see any other plausible answer. The man in yellow is definitely a deity of some sort. Unlike the monsters, his powers seem almost unlimited. He can shapeshift, cause a seizure by touching someone, and wake that person back up by touching them again. We haven’t gotten confirmation, but he is probably the creator of the town and the one who made the bargain with the creatures. If he’s not Lucifer himself, then who the hell is he? As the woman he claims he enjoys being a spectator, which implies that he doesn’t interfere much on his own. Sounds like Satan to me