>>280394135
I could see Asa caring for Yoru as a pet if she becomes a lobotomized retarded little bird devil. Asa forgave her bullies after all, and Yoru, if you take away her powers, is kind of a pitiful being.
It could be that Pochita, too, took pity on her which is why he allowed her to exist as a Bucky-like Devil instead of erasing her fully.