Serenity stayed in front of the boy. She would heal him, she had to. 

"I'm fine, I've had enough rest, and he needs healing. Please just let me heal him." She pleaded. She didn't even wait for an answer. She put her hands above the boys stomach as a white light surrounded her hands and the boys body. Serenity concentrated and to her surprise it made her feel even better. The light shined brighter than ever before. This was her power, her strength. She wasn't weak when she healed others, she was strong. She was the White Guardian.