looking good. Main problems I see are:
the hand holding the sword have fingers that are too stubby, make them skinnier . It would be best to have her hand holding the sword more steadily. it looks like she just flung the sword up and over but her hand isn't grasping the sword securely enough to do that.
The hat should sit lower on the head. a bit above the brow is good, keep the angle of the hat pretty much the same.
the hair ribbon is really confusing because it looks like it's going into her skirt and it going around her left arm is kinda too much imo. If you want to give the ribbon a windy feel, you should give the rest of her garment some flow as well.
I'll do a sketchover later if you want.
figure study looks pretty good, do you go straight into the structure drawing? when studying figures, I find that the gesture drawing is the most important part. It allows you to understand the energy and rhythm of the pose.
For the hair cg, try not to concern yourself with drawing every strands of hair. Using masses of darks and a bit of highlight will suggest the form better. Strands of hair are really only visible when they're seperated from the mass.