To be honest I think that the end result looks really good! I like the concept and the color palette. The faces you paint are also always a pleasure to look at
As for feedback, I'll say that there's something about her left hand that's bugging me a little, but I can't pinpoit the exact problem. And maybe you could add some shadow on her arms where her bracelet are, as they seem a bit tacked on right now. Nothing too complicated, but it could help make them blend better with the rest.
And maybe that the thing that you feel is missing is some kind of background. I'm not exactly sure of what it could be, but just think of a little story where this scene could take place and that could give you an idea of what kind of background to do.
But beyond that I think it's a really beautiful picture, just like the rest of your work! 