Master Chief

Master Chief is the primary player character of Halo: Combat Evolved, Halo 2, Halo 3, Halo 4, and Halo 5: Guardians.

Biography
In the distant future, the young John-117 was abducted from his colony by the UNSC and buffed up into a Spartan, artifically enhanced super-soldiers made to assist the human effort against the hostile alien Covenant. The last of his kind, Master Chief has helped saved the galaxy five solid times, and has marched on as an unfettered one-man-army.

Abilities and equipment
Thanks to the Spartan program training him and buffing him up with drugs and his power-armor, Master Chief is almost unstoppably powerful, agile, and durable. He has a huge arsenal of human and alien weaponry alike, and he has a helpful, super-intelligent AI in his helmet named Cortana.