Not sure if I am qualified to give a critic but here we go.
I really like how you subtly show how Ruby has matured after years of fighting and is not as happy and go lucky as before. You did a good job showing it in her face with the slight arching of her eyes, eyebrows, and mouth.
The light source is done very well with the shadows and reflections making sense and being consistent. The lighting does a good job at better showing off her emotion.
It looks very natural.
So overall a really good piece as usual.