Originally I wanted to add a lot of details but I guess it did not work out that good.
That the character is almost "lost" is pretty understandable and I really tried already to solve this problem. However my palette is restricted to 37 colors and not containing bright & strong colors due lack of usage in the whole piece.
How would you encounter this?
Changing colors could and probably would lead to a total destruction of the piece but I could also add more colors, which is rather feeling wrong because 37 colors are pretty much already.
I do not understand the part about the garish & overly saturated colors. The most saturation is about 40~50. As mentioned above, should I really rework my complete palette?
Hm, yeah. The window is a tough point for me. On the one hand, the lighter parts are making it more detailed and adding depth. On the other hand, they are really drawing the attention.
I am going to remove the little pixel dots on them and since I cannot change their bright highlights to a color with less luminosity, I can only remove it.
The character (it is a girl) was never meant to be pillow shaded but I probably failed. For example the hair is according to the light source from her left (those rays).
Her left leg is also hit by the light rays and then goes darker. The right one's upper surface would also get light from the source, so I decided to highlight it.
The points on her skin (not the face), were meant to be dirt and the even darker dots were shades. There was an older version, being more dirty and wasted. However I removed almost all those dirt in order to improve readability. Also her face got cleaned up.
I just removed the rest now, thanks.
Her chest is hit by the lighting to grant her more volume and some light. I failed again, I guess.
Additionally I removed her highlights on the hair now. I tried to create bigger highlights but then the color's saturations are too different.
I should adjust my palette but that will be really hard.
About the pattern on the ground. What do you think is making them feeling so unreal? They were meant to be cursive. However I could set them normally.
Here is she without background:

Thank you a lot for your help! Hopefully you can answer my questions

If everyone else want to give out his ideas, then of course feel free to do so!