"Well, they don't die, so they don't really need to make more of them, but if for some reason God decides there should be more angels he makes them. It's also theoretically possible for a human to become an angel, but I think that's happened a grand total of three times in human history, and one of them was one of the 'hybrids'--an unlucky one, who had enough self-possession to make sure she didn't hurt anyone but herself. Most of the unlucky ones would have been really really inconvenient to give full angelic powers, but she could be helped. The other two were just really devout mortals."
"How odd. ...Our sort of angels do die, not even later than mortals. Calling them 'mortals' is just convention."
"That's strange. I wonder if your world does have my kind of angel in it...or the idea of my kind of angel anyway, and your kind of angel got lumped in with them? Only no, you said your God talks a lot more freely...you know what, I just left my mom's house, I bet she could shed a lot more light on this situation than I could. Bar, is it feasible for me to fetch my mother?"
She gets up from the bar and opens the door. "Mom!"
"What is it? Did you forget something?" pause. "What is that?"
"It's a bar that claims to traverse dimensions--and I mean like actual sci-fi alternate universes. Come see!"
Anna steps away from the door, and a tall blonde woman walks in.
"...How odd," she says, and visibly flinches when Anna lets the door close.
"Well, I'm guessing from that statement she told you I am one...several of my siblings' names, like Michael or Gabriel or Ariel, made it into the common usage as a name amongst humans, but mine didn't. And...I made mistakes, when I was younger, that...got into Scripture. But my amends didn't. So avoiding incidental notoriety is a bonus, although most people are more likely to recognize the Latin translation of my name."
"I confess the way your sort of angels works seems... excessively complicated," remarks Isabella. "Particularly if abridged versions of your life stories qualify as scripture."
"Still. The first Archangel and angelica are named in the Librera, but everything known about them personally is from other sources."
"It doesn't really say anything about who we are, just 'and then Gabriel told Miriam that she was to bear a son' and 'Michael showed up and looked impressive because that was useful apparently' and 'Lucifer royally screwed up,'" she gestures to herself, "Lucifer being the Latin translation of my name."
"I think... that I might need to know you better before I could take your promises on such a subject. I don't quite understand how powerful you are, and feel rather responsible for my world. I do apologize."
"Unless you also have speed that I don't. I'm given to understand that the body you're occupying is a convenience. But I don't wish to have an elaborate conversation about the details of my limited trust; that seems rude."
"They are from what she's told me."
"Then why are they even a thing? It doesn't make sense. Anna had plenty of problems when she was a baby and no one said boo when I fixed them, and that's in a world where people are encouraged to take it on faith that my Father even exists.
Hmm. Bar, is there any way--a room, perhaps, that you could vouch that I couldn't get to the door from there before Isabella noticed and shut the door to her world?"
"I admit I don't know why," says Isabella. "They only happen when two angels have a child, which is quite forbidden, so it isn't as though Jovah wants them to occur."
...Excuse me." She goes back to the door, opens it for a long moment, closes it again, and returns to the bar.