Mamoru saw her sooner than he thought he would. It was his day to go hunting in the forest; when he saw the little girl crouched in the corner, he felt his heartbeat speed up.
It can't be her, can it? He cautiously walked over, and soon he was standing right in front of her. The moment he stood directly in front of her, Mamoru confirmed the girl he met several days ago.
What is she doing out here?
Surely today cant be her hunting day? They usually do not allow two people in at the same time because there was a risk that the two could negatively influence each other. Mamoru understood the real reason; they do not want to let the kids get too close just in case they plotted against the institution. While they have brainwashed most of the subjects in this place, some are suspicious about this place, like him.