>>41765548I would agree that it's hair based on the fact her tiny body is clearly visible inside. Her "body" looks to be all hair growing from her head and used to give her shape and probably protection. Grimmsnarl does the same thing with his hair bulking up his body and giving him the appearance of muscle mass.
I know I compared her to Grimm, but he's a good example.Though it's a general observation, I don't think there's any real source available to confirm it. I haven't looked very hard anyway.
What do you think she's made of, anon? I really don't think it's slime.