She is looks fantastic! Her limbs are looking a little off.
Nice work, man! Other than th' girl, I also like th' light and those sparks floatin' in th' wind.
You've done an excellent job with many aspects of this illustration; her facial expression, her attire, and background/lighting effects. I also like that she isn't ridiculously sexualized. Her legs, however, do seem quite "off" and low-quality (I don't think they look right, as they are, next to each other, in the positions that they are in). Also, I think more of a distinction could have been made between the tree on the right and the rock.
Her arms and legs seem really off, but besides that, you've captured windrunner's essence pretty well.
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