Gray Fox (Real name: Frank Jaeger) is a former FOXHOUND agent that was once Solid Snake’s ally and a villain from Metal Gear Solid.
The son of a German-American father and a Vietnamese mother, Frank was born in the early 1950’s. However his parents died in the Vietnam War, leaving him to a life of hard labor and discrimination due to being half-Caucasian. Frank eventually wound up fighting in the war for independence in Mozambique, where he became known for his ruthless tactics. Frank would trick his enemies into letting down their guard with the “frankness of a young boy”. He would then kill them with the “ruthlessness of a hunter” and killed dozens of Portuguese soldiers throughout the war. Amongst the enemy forces, Frank became called “The Frank Hunter” but due to his knowing a little German, his allies named him “Frank Jaeger” (Jaeger meaning Hunter in German).
In 1966, Big Boss met Frank, only knowing him as a nameless child soldier working with FRELIMO a Marxist faction in Mozambique. After taking him down in battle, Big Boss brought Frank to a child rehab center, where he thought the boy would be fine. While there, Frank was taken by the CIA, who made him part of their “Perfect Soldier Program”. It made him into an even better killer and stripped him of any sense of remorse. The process also increased Frank’s reflexes to the point he could deflect bullets and enhanced his agility. However it was not without its costs, due to the fact that he was kept in a sensory deprivation water tank that reset his memories and suppressed his emotions. Frank was the only test subject to survive the project and was considered a lost number, earning him the codename, “Null”.