Aria got irritated when she heard about what happened to Iris last night. The reason for her annoyance was that she was trying to look good in front of other people by helping them out in their time of need.
But on the other hand, Aria was too shaken up from that attack and had locked herself in her bedroom. She ran to the underground shelter when she heard about the monster attack and stayed there with the others.
She had been staying in her bedroom, recovering from the shock, but out there, Iris was trying to play luna with everyone.
She was glad that someone snapped at her and put her in her place, but the fact that she helped them didn't sit well with her.
Therefore, today she forced herself to get out of the bed and helped around the tent, though she was so reluctant to look after these people and she had been talking about how Iris didn't come today because Avid had made her pretense fall.