i dont like the horn things.
the colour (warmth and saturation) and the red/orage lines (noise/detail) attract far too much attention and then they just look weird with the hard black outlines with no AA.
just dont know what is going on here as they look more like cardboad cutouty things than something thats attached to her head.

this is her original design. why she's a lighter green than the original grey, is because:
in the story she's from, she's a sort of vampire and vampires where she live glow white. different people have different blood colours and hers is jade (same colour as the symbol on her shirt). vampire's eyes are also more yellow than usual. it's just the design.
as i said, i don't have a lot of experience pixeling.
i did edit it to give more depth and i quite like it. edited on left, original on right. i REALLY like her eyes.

i'm also going to make her animated and just have 2 different frames for mouth and a simple 1 frame for blinking. i'm working on her at the moment, fixing the horns.
E: i really liked how you edited her, Facet !!