Tifa in Original Dress

Heres a quick edit (cropping actually took longer...) I made to your version. I changed up the colors to make it a bit more lively. The dark colors of her hair contrast badly with the dark colors of her dress in my opinion so I edited it a bit. There are still 10 colors, plus one transparent.
What really made me want to give my two cents was because of the shading in the dress itself. It looks very 2d paper-like. The best example I can give is you have a barbie doll and cut a pink dress out of paper and tape it on. I feel this way because you're using two shades of pink. There are technically three, but the two dark shades contrast and make it seem as if it's one and thats why it looks 2d instead of 3d.
The link above shows a flat dress on a flat surface. Admagine picking it up still flat-like and placing it against your body. Your sprite simulates this because of the shading, this is only because of the colors.

Small: The small version is the original that can be ripped from the frame and edited without having to shrink it to an editable size.
Medium: This size is what's seen in FFVI, depending on your resolution you play in.
Large: This version is meant to show the detail in shading.



For constructive criticism purposes and not at all to be rude, I think you should take a glance at this.
http://www.natomic.com/hosted/marks/mpat/shading.html