Is it just me or does her eyes look like their trying to hold back tears?
Could be tears of joy. Something anime artist quite often when trying to show a character has experience the true meaning of self sacrifice, or perhaps in this case finding relief in coming to terms with ones place in the world.
I don't know what I'd call them if they're not tears? Only adding that they're drawn when she has her head down and drawn differently from the empty expression variation.
My name is Eula, and I've been assigned as a public service to Mondstadt.It would be an honor to receive the "seeds of freedom" from all the men of Mondstadt.