Thank you for your help :)
The two greys you used for the line beneath the girl are almost identical to the greys you used for her boots. Why not reuse those greys?
You have a similar lack of reuse with the shading around her mouth and eyebrows, the red of her mouth, the ends of her hoodie drawstrings...
Such reuse isn't required, but it can make you feel clever, help tie your palette together, and reduce the amount of work required to make changes to the palette or make alt-colour versions. Here's a 17-colour version, in case you're curious what difference it would/wouldn't make.