[@HowlsOfWinter]: Okay, um... firstly, when a demon has nonhuman features they [i]can't[/i] just retract them. They can hide them with illusions(if they know how to or have an item to do it) or with clothing, but you can't just retract them away. Also demons are never human(except for the very first ones). They might not immediately appear demonic when born, but that's only because reality takes a bit to catch up with there being a new demon. That's why they also don't immediately stop aging.

One of her parents would also have to be a demon.

There's not really any "Divine Executors", mostly because there's already the Exorcist Corps and then the High Executors within the Exorcist Corps. They all wield blessed weapons of varying kinds, some of the High Executors even using replica Saint's Tools and conceptual weapons.

Also, any injury delivered to a demon will heal until there is nothing left, unless that demon is actually killed. This is because demonic healing reverses time, so scar tissue wouldn't form. There's two exceptions to this in the entire setting, and neither are divine weapons. Divine weapons can kill demons, but if they survive, no permanent injury.