Most plot-heavy Haunted Houses would arrange roles for the visitors to play. That way, they could immerse themselves into the plot more easily, like at Nightmare Academy. In this Haunted House, all the visitors were treated as new students enrolling at the school, and they would adopt the new student identity to slowly unravel the ghost stories at the school.
Theoretically speaking, Chen Ge's identity was also a new student, but he did not have the understanding or preparation to be a new student. Other visitors focused on solving the puzzles and clearing the scenario, but he was focusing on how to become a new nightmare.