The figure is really great i love especially how you managed to to get the curvature of the thigh and back of legs . I think to improve you must practise evening out the curvature on the front of the legs (the line under the knee that carries on to the foot?)
i think it looks a little to thick at the bottom of the leg where the it slenders out toward the ankle and foot ?The only over thing is the foot needs a little more curve and shape on the bottom of the foot and the toes ? Ive you google image foot and draw some realistic pictures of feet and then incorporate it into your Manga style , You'll have an even moreeee amazing style *is envious* Good luck (y) you wont need ittt