"No soldier should be honored for doing what is expected."- —John-117 to first lieutenant Shah, second battle of Mombasa
Master Chief Petty Officer John-117 was a SPARTAN_II of the UNSC NAVAL Special Warfare Group. With a little under 30 years of active duty, he is one of the most decorated soldiers in the UNSC NAVY. In 2553, John-117 went missing in action after the Battle of installation 00 when he and the Arbiter eliminated the Flood threat .
He is also known as the "Demon", "Master Chief", "Spartan-117", "Chief" and "Reclaimer".