[He probably won't get used to it, honestly. He's fussy like that. Aziraphale doesn't often admit that he's an angel to anyone, so he can't say he has a lot of experience with getting a kneejerk reaction of disbelief. It does make sense. It's all a lot for a mortal mind to take in.

He doesn't exactly have reason to be offended, he tells himself, but finds that he's slightly miffed anyway.]

Must you believe me in order for us to work together? It's not a, a parlor trick to be done for your credulity. I'm much more concerned with planning out your stay here.