Over all the picture is good. HOwever, one thing that bugs me is that the words are a bit fuzzy and the color of the background makes them hard to read. My suggestion is making wither the background a bit darker or the words a lighter color.
Rebel herself is well drawn, and the anatomy (as far as anatomy goes with Harevils) looks acurate, so good job on that! However, ot looks like a few sketch marks remain on her heda, so you may want to remove those (eventually), and maybe some more shading on the head.