I have a feeling she likes Nasu, but because she’s mentally weak, she can’t bring herself to admit that she may be falling in love with him since she promised Kaya that she’d never fall in love with anyone and that she’d never leave him.
Then again, she may also have feelings for Kaya too, she just doesn’t know it or understand it. I mean she calls him her “little brother” but doesn’t pull away when he kisses her. It’s giving cognitive dissonance.

who does she like? does she like nasu?? but if so why she keep kissing her little bro?