I'm not going to say this is either bad or good, because I think you nailed Jolyne's qualities down well and got her stand spot on. However I don't think you took the time to give this piece the polish it deserves with some of the jagged lines and the stray pixels. And yet, your sense of anatomy concerning the torso, arms and legs are spot on. The only thing I would say is that her head feels a bit awkward.
I think the question that remains is how much you feel invested in pixel art as a medium. It's fine to say that it's not your thing, but should you decide that you want to experiment further then my best feed back that I can offer is not to rush your work and take the time to really give your work the love it deserves when it comes to this. Pixel art is more precise than digital art and you have to be meticulous in order to get stellar results.
However, on the bright side of things I've looked at your gallery and you have some very strong pieces of digital art that I think deserve to get you scouted and I'm willing to do that for you on that note.