SHe looks cool ... really dig it .. one gripe. The hips!! Look like old womans hips. lower them, make them bulge out just above the crotch. That should make her look much younger and sexier. Like the line work.
I agree with Bren on the hips issue, check out the proportions on the abdomen. Also watch out for the overlap of the left elbow (our right) on top of the waist because if it weren't there, the the waist would technically be really thick! The overlap of the boob, the elbow and the waist is awkward.
But aside from those minor points, the colourings is great and I think the rest of the anantomy is pretty great as well.