B-021-331 was a Brute Stalker who fought in a major skirmish between the UNSC and the Covenant Loyalist forces during the Battle of Earth in 2552. He was killed by sniper fire, and his body was later recovered by the UNSC. Although his armor was relatively new, the many bullet scars on his torso, a dull bayonet on his Brute Spiker and a missing digit on his left hand proved that he was a veteran.