C+C request, sprite sheet of my persona.

[Speed-X]

I think that the main concern as of now should be to fix the lineart. It looks incredibly jagged and/or too straight-edged. On the scarf especially, I noticed that you're using a 2,1,2,1,2,1 pattern, which is not good. Instead, you need to round them out; try something along the lines of some ratio of a 3,2,1,2,3 pattern.

The head looks as if it consists of incredibly straight / polygonic edges, which isn't natural one bit. You may need to use a 3,2,2,3 pattern.

I'm sorry that I'm lacking any images as of now. I'm currently on my phone, but I nonetheless wanted to give advice while I still remember.

Edit: ah, you guys totally beat me to it. Hahah, I guess that's what i get for not refreshing!
Oh well. :>