175px-Master Chief in Halo 5

Master Chief Petty Officer John-117, more commonly known as the Master Chief, is a SPARTAN-II commando of the UNSC Naval Special Warfare Command. He is the protagonist and main character in both the Halo trilogy and Reclaimer Saga. With over thirty years of active duty, he has become one of the most decorated war veterans in the United Nations Space Command, earning every known UNSC medal except the Prisoner of War Medallion.


During the final battle of the movie, several Master Chiefs form a clan of gunters that come to the aid of Parzival and the other members of the High Five. They are zeroed out by The Cataclyst.