Clarence
From Halopedia, the Halo wiki
Clarence was a ONI Section 3 operative who was assigned to the UNSC Red Horse. He participated in the skirmish on the Flood-infected UNSC Mona Lisa. Clarence was under orders to not permit anybody but the marines to escape the ship. He followed those orders when he excuted a prisoner named Rimmer, who had made friends with an elite. Corpsman Benti forced Clarence into a mob of flood, becoming assimilated into the Flood. Clarence died when a Shiva Warhead destroyed the ship.
