Very good and nice conveyance of emotion. For what you need to work on, I'd say to work on the wrinkles, folds, and shadows that make something look truly three-dimensional. Like for instance, the way the face folds in around the eyes when the person is really upset can add a lot. Try looking into that kind of thing!
I'd love to see what the Light Novels eventually do with her. Priestess having a hang-up about visiting her is a loose thread right now, and I have no idea how that loose thread will be tied up. I hope it's great.
I am wearing the exact same kind of shirt Maria is wearing right now, that kind of color explosion shirt.