Edward Buck

Edward Buck is a veteran UNSC soldier, ODST and eventually Spartan who served in many Battles of the Human-Covenant War, most notably the Battle of Reach and the conflict surrounding New Mombasa in the final days of the war.

Buck had been an ODST for most of his military life but chose to become a Spartan after the war in the hopes that he could use the extra pay to secure a second series for Firefly. It didn't work.

He joined Fireteam Osiris mostly to get away from his wife, who was so full of big ONI secrets that she couldn't give a guy a yes or no answer, apparently.