Good work.
I have a few ideas -
if the ballerina is a little smaller and further back with the fog over the dress it will look more atmospheric.
I personally would reduce her breast she looks too busty for ballerina.
Tint in pink on the ballet shoes, and either highlight or edging of the choker, maybe a very few strands through the hair slightly of a differing shade of pink.
The mist and dress do have purple through it so it may go well, or it may be too much, just some ideas for trying out etc.
