Marty and Willis
In all the years that he missed the chance to hunt down this one demon, and he shows up and claims to be a tool of God. He well and truly was not amused or joking, so the poor sod probably thought he was. Who was Marty to break that illusion he had, at least right now when they had just met and all. Perhaps he if he kept it a secret from the good Reverend he might be able to lure him away from the grounds.
"Oh, no nothing, just not a believer myself Padre. I've seen too much shite to really believe in any sort of higher power." That and he knew from experience that God and Satan were just mythical creatures people used to describe the angels and demons of this world. There was no one sentient life force ruling over them all, just the good and the evil right there on Earth.