I can see hands are your problem, and the only way to improve it is looking real human hands and practice with those, it will give you idea on how hands take different aspects depending on what are they doing. Also I would recommend you to think how hands work or see your own hands on the action of doing what your drawing is doing. But basically at the end, hands and any other human body part, needs practice and understanding from the human body, and ones this is understood, creating synthesis of the human body through a expressionist, cartoon, anime style or what ever style you want to make, it will become easier (as you know the base).
Other odds things are the clothing, as the wrinkles has too much weight and almost nothing of depth. If you look at the drop on the arms, you can see it look like some kind of heavy fabric that can maintain itself on wrinkles that challenge gravity. But at the same time, the cloth doesn't look like working on a depth effect, which make us, the watchers, to perceive the drawing as a 2D stiff model, something you should try to evade. And this problem is not just on the arms, but also the body and skirt, as the body doesn't provoke deepness, the quiver belt goes around the body without even noticing the shape of the body and the horizontal strips on the abs have no volume either. The skirt is being cut in a section that makes it look that its asymmetric or with a bad cut (look left bottom, you are going to see the skirt lifting a little, the problem is that all the wrinkles goes down, except those, making the idea that I'm looking 2 different things that do no mix, but as being drawn as the same, create this perception that the skirt has a bad cut).
What I can do see is that you have focused a lot on practicing faces, specially that kind of anime faces, as its basically the cleanest part you drew and it shows most guide lines. I recommend you to give as much care to the body, hands and foot, these last two are the hardest for most people, and to improve all this, is always going back to real human body and a lot of practice, understanding and love.