(n.) A secondary person or agent; a subordinate\.

assistant cog commonality commonalty creature dependent employee feudatory flunky follower hanger-on helper hoi polloi homager inferior junior lackey liege liege man lightweight lower class lower orders masses minion myrmidon pawn peon poor relation retainer right-hand man scrub second fiddle secondary serf servant slave stooge subaltern subordinate third stringer understrapper vassal yeoman yes-man