Lin Sanjiu clearly remembered that Reno 2 (without the mark on his wrist) was on this floor. Even though she didn't constantly check his wrist, she was sure that before Reno entered the bathroom, his hands were clean, and he didn't have an "X" mark.
"But that explains things…" Mrs. Manas mumbled as if she had already figured out something. "Reno 2 is also fake. Even though we don't know how Reno 1 managed to come to this floor and replaced Reno 2, Reno 1 did step out from this bathroom. Thus, he could activate his almanac ability…"
