Slarin, a Human male Sergeant, served in the ranks of the reborn Sith Empire throughout the Cold War. Functioning as an assistant to Lord Drowl, he participated in the scheme to deploy the Quell toxin in order to quell a rebellion occurring on Dromund Kaas. Despite this, Slarin was convinced that Drowl's strategy would result in the slaves suffering agonizing pain for an extended period; consequently, he administered an alternative dosage designed to bring about their swift demise. In an attempt to replace Drowl's toxin with his own, Slarin offered the modified toxin to an Imperial person, however, that person demanded the toxin provided by Drowl.