Town Witness-Protection Program Director
During setup finalization, the mod will pick 3 non-town factions (for example, Mafia, Werewolves, and Aliens), at least one of which is guaranteed to exist in the game.
You will be assigned 3 witnesses to protect, each one protected from a different faction. The witnesses are confirmed to you not to belong to the faction they are protected from.
You share a separate PT with each witness. As long as you are alive and not roleblocked, witnesses will be protected from all actions by the faction they're protected from that target them.
An example of how this would work:
Player A rolls this role. He is informed that Player B is not Mafia (and has a PT with her), that Player C is not Cult (and has a PT with them), and that Player D is not Alien (and also has a PT with them).
The nontown factions in the game are the Aliens and Werewolves.
So all actions the Aliens take that would target player D, fail. Unless Player A is roleblocked.