In the Mechanical Main Brain Area, Pupil was examining Gao Gong's files.
Collider, Chapai, and Pupil are all members of the Mother City's Ghost in the Shell Mobile Division, tasked by Yagami Suuji to investigate the cause of the previous director, Mr. Aramaki's death.
Among them, Collider is an Advanced Mechanical Life, a level 50 elite NPC. It seems strange for a mechanical life not to belong to the four major factions, but Collider is exactly that. His virtual personality matches a normal human 100%, which means treating him as a 100% mechanically transformed Primordial People is entirely correct.
In fact, what he constantly thinks about is how to woo Yagami Suuji.
This is also why he could become a member of the Ghost in the Shell Mobile Division.
As for Chapai, a superpower hacker—a superpower user and hacker, both identities are rare.
