Her dark hair sort of blends in with the dark background too much, so I think it could use a little more light and separation there. Also, the way that her hand is cut off at the wrist looks awkward and out of place to me. Just my opinion.
But on the positive side, her eyes are quite lovely! Thanks for sharing.
I would like to see some more portraits of her in different poses. Any chance you could give it another go and post some more?
NJ