There was a bit of fear in Katara's gaze now. It was one thing for Luna to be upset, but right now she was remembering something pretty bad, and it was silencing her. Katara had seen that reaction before: the Firenation had hurt enough people and done enough horrible things that she'd seen that reaction before.

She seized the girl's hands. "Luna, please listen to me! I know whatever happened to you must be scary, but I'm really concerned! If the Nightmare King gets to you, he'll show you what you're seeing now and worse! Please listen to me, I want to make sure you have help!"