Xue Yang doesn't have time to look at her expression, only noticing that she actually managed to listen to him as a demon goes down.

"See what happens when you listen to me."

That's about as much approval as she can really expect to receive from him. He isn't there to babysit her through a battle. Fighting is all about learning through doing. At least she is more useful then the brat that would do nothing more then hide and spy on him.