Human
Ryu laid back, looking at the ceiling. Between his legs, curled up like a kitten, or maybe like a dragon, Selheira lay apparently sleeping. She used his thigh as a pillow and she seemed to have completely forgotten the world around her, a look of satisfaction on her face.
This woman didn't seem capable of even sleeping normally, it seemed. She just curled herself into a ball, and when he thought she'd try to sleep by his side, she took the weirdest position possible.
He couldn't lie, he found it a little amusing.
At the end of the day, Selheira was, indeed, not a human. In fact, Ryu had never heard of a beast taking human form at all. It should be something that only the absolute highest levels of beasts were capable of, or it was possible that Selheira was using a special technique of some sort.