Chapter 279 Painter
Kat did eventually get a reply from Lily, but not until it was much darker outside. It also didn't really contain anything she didn't know, and cited that she was in fact prevented from discussing the angel in question as Kat had guessed. There was however, a bit of unique information that she provided.
Angels are one of the only things that don't show up on the list at all. Demons are another one, and maybe some stuff I've never heard of, but when I asked, it was explained that anything that transformed someone into a demon unnaturally would drive them insane and then kill them. It did worry me a little, but apparently your transformation was natural? So… that worry was dealt with quickly. Anyway, unlike some races that only have halves or quarters listed, or just full blood races, there is nothing about angels.