Hey, Ive made some feedback for you, cause youve asked about that. Ive tried to push your idea a bit, sorry if I made some personal changes, I didn`t want them to be included.
Here I tweak contrast lower and brightness more than added a multiply layer to add more shadow to the bottom of the character. It was always good to make focus point near the face of your character.
After that Ive select orange parts and tweak a bit by using levels and curves, cause there were still many really white and black parts in it.
Then ive selected yellow and blue parts and change colors to be a bit more complimentary.
The last step was to tweak her face and add contrast shadow near her face. And a bit rendering of her suit after all.
And it always better to check tones of your work, cause we need as I said focus point on the most important parts of the character, and usually it is face area, here you can see how our focus area changes after tweaks.