In Godspring, there appears a winged girl.
"Oh good question -"
A lot of conjuration later: "Seashells from the food she brought, apparently."
"Quite. Okay, do we have any better ideas than fetching shells and getting portaled to egg person world to... what do we even say to her? The circles are obviously for immortality, do we have to say 'your friends and family all have to die because of vague bad actors in another dimension who might hatch some of you'..."
"It's not even just that, we also really can't have them all daevafy if they all have the interdimensional teleport, and if it's transmissible we need to keep a lid on it beyond that - we could have a Vala make them unaging -"
"Might be a good enough substitute. If the problem isn't a plague or something."
"Well, they might not like the idea of unvetted demons hatching their eggs either."
"Hopefully not - would it really not have occurred to them, if they were in Godspring long enough to learn everything else..."
"I don't know. She wasn't there long enough to plausibly learn the language of one place, let alone everywhere she went, probably has magic translation, maybe it's costly and she wasn't thorough?"
"I guess if there were people urgently dying it might seem more important to get it home than to know what you were doing with it."
"Could have missed something irrelevant to her, like, 'demons can't normally make people', and assumed it didn't matter about the eggs..."
"You'd think if you thought demons could make people you'd be hesitant about bringing your species to their attention, at least hesitant enough to stick to angels and fairies or not be around when the summons got answered..."
"We don't! Can't even speak the language, I think it requires either better ears than I have or something magic..."
"Can't rule it out. But she could read, she spent awhile at the computers..."