A good piece of movement, and those eyes are very deep and very impressive.
Not that this isn't a good looking piece already but, if you want to imrove on it you can try making hte background look like its moving with the movement of the character... or moving against her movement, i forget which one looks good.
What i mean is... well think of the line of action in her and just use that as a pattern starter... Ya
I know you made this awhile ago but, just a suggestion.