[Rich raises an eyebrow at that. He's not always good at sleuthing, but he's been paying extra attention to what Aziraphale has been saying, trying to piece together what he can about the man's life before this one. His family wasn't particularly religious, but the creation story is basically ingrained in any kid his age. But to Aziraphale, maybe it wasn't a story?]

Are you... are you actually talking about the Garden of Eden? Like Adam and Eve, the stuff with the snake, all of that?

[And then if that's what he's talking about... he gapes at Aziraphale, looking at him carefully like he expects some holy light to start radiating off of him at any moment.]

You're an angel, aren't you?