This piece looks great! Ene is so adorable what a cutie omg
There isn't a lot I think I should give you advice on, but I hope this helps all the same!
face The face shading looks great, and it's very fitting for the style that you used. But at the same time, Ene looks kind of pale - probably because of the grey used to shade. There are many types of greyish tones, some of which are more pink than grey, which are very useful when shading skin. Pinkish, peachy tones make a person look healthier and sometimes cuter. So perhaps you could add a blush of some kind?
hair There is just one suggestion I have, which is to add highlights in her hair. adding lighter parts make her hair shiner, more eye catching and pleasing to the eye. Since both Ene and the background are slightly dull, it would do the piece good to have more contrast.
other as I mentioned earlier, Ene and the background are both slightly dull. I suggest that you brighten up Ene by adding highlights and shading more darkly, so that she doesn't blend into the background.
Thanks for reading and I hope to see more art from you in the future!
I read through the description and the render link should be a link to another render - although I can't be sure if this is original or not. Though the critique still applies, since it's about coloring mostly. thanks for telling me!