I've been
reading up on the Anzillu again, trying to get some ideas for what the pre-fall political arrangements of the world might have looked like.
Skipping back a little:
Snakes from the waist down! FWIW, I feel like the Faceless, the Lamia, and some integrated Deva/Nephilim caste are the juiciest options at the moment, but... if you really twist my arm:
* Tirzuk- maybe nocturnal to the point of using echolocation, and communicate at frequencies humans can't hear or pronounce, leading to reliance on sign language for barter or diplomacy?
* Gaz- thousand-year lifespans, so immensely skilled and dangerous by human standards (like elves by all rights should be), along with large populations thanks to reduced metabolic demands? Haven't taken over world because... <reason X>?
* Wilder- chameleon-style camouflage/communication? Human subspecies? Alternatively, maori-style intense tattooing as a form of animistic magic?
If you wanted, you could make certain 'species' a question of magical recessive genetics within the human population, like blue eyes or lobeless ears or D&D-sorcery. And Indian cultures obviously had some funky stuff going on with reincarnation cycles and gender-bending, if you wanted to mix those in.