Like most people

Aion didn't notice that before, but after resting for several hours, he eventually came to realize that the walls of the labyrinth were emitting some sort of light that kept its interior completely free of darkness. Not only that, Aion had a hard time melting a single part of the labyrinth with his magic… that sure was some weird ice.

Thanks to that, it was hard to say when it was day or night inside. So, they rest until they are satisfied instead of waiting for sunlight.

"Are you sure you don't want a weapon?" Seris asked.

"No. I have decided your method to solve things as efficiently as possible isn't wrong, but I can't abandon mine. I will use all chances on my path to improve my skills."