While your work is always quite serene and extremely lovely, there are a few things I would critique -- though take them with a grain of salt -- these are simply personal opinions.
#1 being I find the back of her head to be quite... small? If that makes sense. Like, compared to the size of her face, the way the hair falls behind her doesn't quite add up to me, proportionally. I mean, the actual execution of the hair and how it falls is flawless, I just would've added more, I suppose.
..Actually, I think that was my only negative critique...
Everything else is wonderful -- I personally adore her whole delicate posture, especially the hands. I am in love with how you do your hands. I love the colors used on her body and her hair. I feel like she's some kind of fairy who protects innocence..
Again, this piece is solid! Lovely! Keep up the good work!