Gray Fox

The code named Gray Fox is a character from the Metal Gear series. His real name is Frank Jaeger. In the original Metal Gear, he was saved by Solid Snake. Later in the games, he betrayed and fought him in the final battle in a minefield. Fox lost and was presumed to be dead, but his body was recovered and put into a Cyborg Ninja exoskeleton that appears in Metal Gear Solid.