Alright, first of all . . .
This is some absolutely amazing work sir. A couple of things really caught my attention:
The play of light off of her face really impressed the hell out of me. Not only does it look extremely natural, but it looks as though you actually thought to provide shading on her face consistent with the way her arm blocks the light of the blade/disk (at least it looks that way). The texture of her suit, particularly on her back was very well executed, and I really enjoy the phosphorescence of her weapon. The composition was a nice choice too, and I would really like to see your style applied to a more dynamic stance, or on a subject in action. Really, this is just a pleasure to look at and take in. Thanks for sharing!