In teasers for the game it mentioned that the AIs such as the Mayor, Gerda, and Otto would have secrets that would've made them have a reason to be suspicious. But in the FG we just got keys as their secret.
Otto's secret was that what was he hiding in his attic, maybe he could have a hatch that quite possibly hides something suspicious probably something creepy but not too far but idk go crazy but not too crazy. And we'd have to unlock it with a key.
Gerda's secret was that she'd have something out of the ordinary in her cherry pies no one knew what made her pies taste so good but it did mention something fishy about that. Maybe she could have a basement cellar where maybe her secret is there. Maybe we can learn more backstory elements and stuff about her.
The Mayor's secret was about what he would hide in his study room. I mean we already know what he hides in his house a forest protector room maybe there could be a scene where after we go into the room Quentin takes pictures and then the Mayor sees him and gets really angry, and then the cops arrive and arrest him. Maybe there'd be a crowd of neighbors booing and getting angry at him for destroying their trust and also since they found out he was part of a cult. Maybe the cops would compliment and thank Quentin for what he did since the cops really seem to hate him specifically Keith lol.