The girl's question, 'Are you an angel?' suddenly makes a striking amount of sense with news that Aziraphale's the one looking out for her. "She told me. I..." he gulps. "I was trying to help her in her dream. We were in the Meadous, and I flew her to our wishing pond. We were going to wish her human."

Bertie is worried for the girl, but he's perhaps more worried for the populace at large. If this really is a dream, then she can't do too much damage, but he still doesn't relish the idea of setting loose what he assumes is a little vampire girl who has trouble controlling herself on the unsuspecting realm of dreamers. Dying in one's dreams is rarely pleasant, and he can imagine it would be equally unfortunate to die in a place controlled by some other villain apart from Zephyr.

"I think I must have gotten her hopes up terribly."