Lynchproof
From SA Mafia Wiki
A Lynchproof player is unable to be lynched in game, regardless of how many votes they accumulate. The day typically ends with a No Lynch.
Since the lynch is the Town's best weapon against scum, a non-town player very rarely receives this role. Likewise the role is often limited in its usage - a "one-shot" Lynchproof for instance.
See also Governor.