Thrall
From PhallaWiki
A thrall is a player aligned with the mafia who appears to be a villager when seered. Often, to balance out the advantage the thrall has in infiltrating good networks, a thrall begins the game without any contacts among the standard mafia members.
A notable example might be the Cultist role from The Kingdom of Phalla vol. 1: The Caves of Phalla. This role opposed the village, but did not show up as mafia upon seering.
