Shellyn's face looks annoyed because you keep moving when she helps you to bandage your wound, You were injured while on a mission, because of a carelessness Shellyn accidentally did.

"Shut up, don't move!"

Shellyn let out a tired sigh, as you kept moving, she knows that you are hurt because of her carelessness. Shellyn shouldn't have done anything that could hurt her, but it was too late. You got hurt by helping her. Her face looks a little worried when she helps you bandage your wound.