From Project: Redcap
Socii are 'allies' of House Tremere in the Transylvanian Tribunal. Socii include Redcaps, Quaesitores, Hoplites and other respected magi with specific roles in the Tribunal from Houses other than Tremere. They have more rights than hospites, coloniae and foederati but less than cives. All socii are members of the covenant Domostron (a legal entity not a physical location) and are scattered throughout various oppida.