Walker
From Halopedia, the Halo wiki
Summary
A Private in the UNSC Marines. He was present at the battle of Sigma Octanus IV and was one of only a handful of marines who survived. Cochran and his team had gone on a scouting mission when all but himself and three other marines (Corporal Harland, Private Fincher, and Private Cochran) were killed by the Fuel Rod Gun of a Hunter. He was the heavy weapons expert and carried several Jackhammer Rocket Launchers. He was, however, in shock after the death of his squadmates and hardly capable of fighting. The four fell back to their HQ, which had been destroyed by covenant. He eventually made it back with the rest of his team. There are two possible outcomes to his fate: