I think. Haha.
I had a hard time creating a background for her. I had a few thoughts but need way more practice.
The background is just a paint fill effect that I had muddled with then I had changed lighting trying to blend them together more smothly.
Here is the very original I had made which resulted to be the one in my first post :
The original coloring was cooler to me, lots sharper since you just inverted them in the final piece. You could change the hues without having to invert the darker tones used in line work and shadows if you wanted, possibly providing a better look?