He grips onto the fabric of the back of her shirt a little and buries his face in her shoulder, startled and scared. He doesn't do well with confrontation
Asriel: quietly L-Lanie...P-please don't shout...
Sky mother: You will let go of my daughter, and you will never address her in such an informal manner again. You will fight Melos, and one of you will die, and I DO NOT CARE WHICH. NOW GO-BEFORE YOU DISGRACE YOUR FAMILY NAME ANY FURTHER!