First i have to say she has a beautiful design.
What i like is that while her expressions are kind of "muted" you can see a lot while focusing in her eyes or mouth.
Also, good handling of the arms position.
You could also play with the position of the shoulders. When people are relaxed they usually lower the shoulders a bit. And when people are tense(for example when they are angry) they lift them a bit.
I guess i would have to know more about her personality and background to know how well it fits the way she shows her emotions. Some people are more expressive, others are more stoic, also the social environment affects how a character moves, walks and the gestures.
You are doing a great job with body language @Mari , but if you want to go the extra mile, i would recommend you a book that helped me a lot. Is called "what every body is saying" is from an ex-fbi agent who had to interrogate lots of people and he can detect different emotions in every part of the body.