Lorrum was a Kazon and a member of the Kazon-Nistrim sect led by Maje Culluh.

Michael Jonas, a crewmember of the USS Voyager who had turned traitor, was transmitting information to him. Jones informed Lorrum about the Cardassian missile Dreadnought, and contacted him to pass on information about dissension among the Voyager crew. Lorrum wanted Jonas to create an accident on Voyager that would damage the warp coil. (VOY: "Dreadnought", "Lifesigns")