Her design is pretty badass and I like the effect you did with her hair there.

If I were to criticize, I think the pencilly outlines of your other drawings would have enhanced this further. The linework and coloring are top notch, but I think using a pencil texture helps make the image a little less plain looking by emulating the feel of a traditional drawing. I hope that makes sense, cause I cannot describe my feelings all too well.

Either way, you're doing really good so far!