Master Chief

Master Chief Petty Officer John-117 is a fictional person. He is the main protagonist of the "Halo" video game series. He is also called Master Chief, or Spartan-117.
Master Chief is a player character in "", "Halo 2", "Halo 3", "Halo 4, Halo 5: Guardians and Halo Infinite". He also is also featured in several novels and other games in the Halo series.
The character is never seen without his green-colored armor and helmet. He is one of the most recognizable characters from Halo. Several action figures of the character are available.