In games in which multiple killers are present (i.e. werewolves and Mafia), the sensei is a plain civilian who cannot be killed by only one assailant during the night. Why? In the words of character creator Erich Greene, the sensei is "way too cool."

The sensei may only be killed during the night if he is killed during that night by more than one agent, i.e. a Mayor and a Vigilante.

The sensei survives the edges of a Rambo 3-wide grenade blast, but dies at the center of one.