Master Chief

Master Chief Petty Officer John-117, commonly called the Master Chief and John alternatively, is a fictional character and the main protagonist of the Halo universe, created by Bungie Studios, and is a player character in the trilogy of science fiction first-person shooter video games Halo: Combat Evolved, Halo 2, and Halo 3. Outside of video games, the Master Chief appears in the novels Halo: The Fall of Reach, Halo: The Flood, Halo: First Strike, and Halo: Uprising, and has cameos in Halo: Ghosts of Onyx and the Halo Graphic Novel. He is voiced by Chicago disc jockey Steve Downes in the video games in which he appears.
The Master Chief is one of the most visible symbols of the Halo series and the video game universe. Originally designed by Marcus Lehto, Rob McLees, and Shi Kai Wang, the character is a towering and faceless cybernetically enhanced supersoldier; he is never seen without his armor or helmet. The character has been called an icon, a relative newcomer among more established franchise characters, such as Mario, Sonic the Hedgehog, and Lara Croft. Electronic Gaming Monthly named the Master Chief as the eighth greatest video game character ever.