It's hard to critique something when it's in such early stages. One problem I do see though is that in the side views, the character appears to be leaning forward and lack a butt. The pose of their arms is also inconsistent with the other frames, at least the way I read them (small pixel art is naturally rather ambiguous).

Here are a couple of possible ways to address it:

Neither is a perfect solution, and I think once you start adding hair, clothes, shading, etc, it'll be easier to subtly suggest features that cannot be shown with just a solid outline. So, rather than perfecting this outline, just keep this issue in mind as you move forward with drawing characters using this case.