Yutrzenika was a male Orbital Drop Shock Trooper stationed aboard the UNSC Pillar of Autumn in 2552. He was present during the Fall of Reach and the Battle of Installation 04. At the Marines' makeshift Alpha Base, he was one of the two ODST's who helped guard Major Silva's quarters. He hassled John-117 about his name before First Lieutenant McKay stepped in and allowed him to pass, after pointing out some irony in the argument. He was probably killed when Installation 04 was destroyed, or when the ODST-controlled Covenant battlecruiser Truth and Reconciliation crash-landed on the surface of Halo.