O'Brien was a member of the UNSC Marine Corps who participated in the Human-Covenant war. He was an Orbital Drop Shock Trooper of the 105th ODST Division contingent aboard the UNSC In Amber Clad.
O'Brien was a member of the UNSC Marine Corps who participated in the Human-Covenant war. He was an Orbital Drop Shock Trooper of the 105th ODST Division contingent aboard the UNSC In Amber Clad.