She looks awesome so far! I love all the nice details. I'm sorry in advice for saying what I'm about to say since you are already far into this drawing, but I think there's just some small anatomy issues, mostly with her right arm, which I believe might be too short. Also, the hand holding the key looks a bit starnge to me, but I'm not sure. I'm kind of rusty, so I apologize for the roughness of my paintover, but I think it should look more like this


But other than that, I don't really have anything else to say. That's a really cool design, I like the colors and the line work is pretty solid. It will be awesome once rendered. Keep it up 