Glad you like the fight as well!

I've fixed the banding problem and reduced the amount of dithering. However, I can't do too much about the colors, since the original design is that she wears a pure white dress. I did add a bit red into the white colors, but all I could do is make some small hue adjustments. Thank you for the tips by the way.

I really enjoyed that fight. Fun game! Could tell who she was. I think you have the general likeness down. 

The headband area is a bit messy and has some banding going on. I'm also not convinced that the dithering is necessary, but that's my personal taste. Eyes are a little off and don't adhere to perspective. I'd also consider looking into hue shifting and choosing some stronger colors with more contrast to make the sprite pop.