Adin generally has two forms; the original body she uses to maintain a facade of mortality or when acting as an avatar, and her true ascended presence that she takes whenever she needs to do spooky elder god stuff.
Here we see her in a rare transitional phase between the two, something usually only seen by those who will shortly have their minds obliterated by her fathomless power. Or worse, taken in as one of her favored playthings >>

This is another doodle I got from a kind redditor courtesy of the r/ICanDrawThatForYou sub. Highly recommended you give it a try, there are a ton of incredibly skilled people out there who deserve more attention!