Earlier, on the battlefield behind the Sushit Grand Theater, Charlotte had thought Benjamin had already become a "Spectator" because he had repeatedly watched her in secret. This bore some resemblance to the Purification-ers' internal summaries of the behavior of low-sequence Beyonders of this pathway: they often observed the people around them with barely perceptible glances, as though they were spectators and everyone else was a performer onstage.
Although Benjamin's gaze held no malice, nor the obvious emotions and intentions of other men, it made the keenly perceptive "Sheriff" deeply uncomfortable. Coupled with the fact that he had waited behind the theater with a carriage when Gervais fled, and had demonstrated familiarity with a "Psychiatrist's" abilities and knowledge of official Beyonders, this made Charlotte increasingly suspicious of his identity. She had therefore questioned him directly to test him.
Fortunately, Benjamin probably knew that even if he did not confess, official Beyonders would question him afterward, so he quickly admitted that he was a "Spectator" and had been waiting behind the theater for Gervais.
After confirming this, Charlotte and Roselle both advised the wild Beyonder, who had turned back from the wrong path, to confess everything to the Machinery Hivemind, who would soon arrive. As long as he had committed no serious crimes, he would at least avoid being implicated by Gervais. Both the Church of the Eternal Blazing Sun and the Church of the Artisan lacked Beyonders of the "Spectator" pathway. They would very likely be willing to give someone who could analyze others' intentions by secretly observing their microexpressions and movements a chance, making him a peripheral member who provided some assistance in exchange for protection.
Sure enough, Roselle soon received word from the Machinery Hivemind that Benjamin Mori had been allowed home after explaining everything. The following day, he