Master Chief

Master Chief, whose real name is John-117, is a highly decorated and augmented super-soldier, or SPARTAN-II, in the Halo franchise. Kidnapped as a child for the secret program, he was trained from a young age to be an elite fighting machine. He is known for his iconic green armor and his relationship with the AI Cortana, acting as a symbol of hope for humanity in its war against the alien Covenant.