The neck feels obsured- I can't even make out any lines to show where it is.
Her left arm is a bit too strange- I'm feeling like it is small. Whatever area is shown in the right arm makes it seem larger. Try to see if the angle of the elbow is correct- there's some iffiness there as well.
I can just see that if her arm is straight, it wouldn't seem as right as it should, compared to other body proportions
Coat/scar/cloak thing DOES NOT feel as fleshed out and done as well as it could have.
The angle of the picture gives the slightly sideways look, and the thing covering her eyes has an arc that makes it seem like she's not turning in that direction.
SWORD IS NOT STRAIGHT. A minor detail, but it feels honestly easy to correct. Try to straighten it out; the fact that it seems easy to correct and didn't is noteworthy
Nor does it seem a proper length. I don't know what you're going for, but it feels like a long dagger/short sword right now,
The size of the legs are noticeably different, although the fact that the picture is cut off might have something to do with it.
Overall, the usage of pixels in this picture, use of gale noticeably, are notable. It doesn't really work out well with the picture; all edges are hard and rough, and the natural wrinkles at the bottom of her shirt/skirt are way too noticeable and doesn't seem smooth, as much as it should have.
Is the head a bit big? Just thinking.
The hair feels blah, especially with the gale pixelling. Not as flowing as much as frozen in air and sticking out.
The shoulders are not done particularly right. A shoulder is roughly the length of another head across, and hers obviously does not follow that.
This may be anime, but in the end some body proportions must still be followed.
That's all the criticism I could find.
That about covers it all to a tea. If you're going to practice your drawing. I'd suggest you go back with the pencil and paper. Using a tablet or mspaint pencil tool is not a good way to learn how to do proportions. You must first learn the proportions, then try hard stunts like that. If you so desire you could always scan a penciled drawing to the computer and then outline it. I prefer Paint.net, it's free and easy to learn.
I'd suggest using references when you draw, if you're not sure of something, grab a ruler. And if you need to, put the paper up to your screen and compare things.
references are like training wheels for coming artists. It's a tool I still use today.