I still can't feel any "romantic" affection coming from Noelle that isn't...strange?
She never romantically liked him (because he was a boy) from the beginning. I think she was confused and wished for him to be a girl instead because she did like him to some extent. She only started showing visible interest when he turned into a girl. Fundamentally, he's still a guy and HIM on the inside. But he's exploring how comfortable he is now being a girl.
Meanwhile, Eito, recognized him immediately and still likes him for him (regardless of gender).
Noel is clearly a lesbian or just plain confused. She needs to sort that shit out and not cause Kei any further confusion and heartache. She's too self-absorbed to realize his feelings. But at the end of this chapter, she is admitting to understanding a lot of what's going on with Eito. Maybe cause she had the same worries.
And if it wasn't abundantly clear, I am biased towards Eito.