Master Chief

John-117 "Master Chief" is a fictional character and the main protagonist of the Halo fictional universe, created by Bungie. Master Chief is a player character in the series of science fiction first-person shooter video games: Halo: Combat Evolved, Halo 2, Halo 3, and Halo 4. Outside of video games, the character appears in novels – Halo: The Fall of Reach, Halo: The Flood, Halo: First Strike, and Halo: Uprising – and has cameos in other Halo media, including Halo: Reach, Halo: Ghosts of Onyx, The Halo Graphic Novel, Halo Legends and Halo 4: Forward Unto Dawn. Master Chief is essentially the face of the Halo series. The character, as he appears in the double story arcs, can be described as a towering and faceless cybernetically-enhanced supersoldier; save for the first installment of the second story arc, he is never seen without his green-colored armor and helmet (even then, only his eyes are revealed). The alias "Master Chief" arises from the two ranks which John holds throughout the later events of the Halo universe. By the end of the third installment of the first story arc, John-117 is canonically promoted, in absentia, to the rank of Master Chief Special Warfare Operator of the Navy.