Sitting in the valley, Michelle felt the exhaustion hitting her, but she knew she couldn't fall asleep. If she did fall asleep, she could end up sleeping for maybe even a month or more. And although she could afford it time-wise, before that, she had to at least explain to everyone what had happened in the cave, or they would just pointlessly panic if they couldn't wake her up.
As the darkness in the valley slowly retreated as the sun rose behind the horizon, Michelle could hear movements around the campfire. She wasn't looking that way, but she could guess that the one who woke up was Ivona. She was a light element Spirit Master, so with the concentration of light element spirit energy increasing with the dawn, she sensed it and woke up.