Skull Face is a mysterious and malevolent character in the Metal Gear series, serving as the primary antagonist in Metal Gear Solid V: Ground Zeroes and Metal Gear Solid V: The Phantom Pain. As the commander of the paramilitary organization XOF, he is driven by a deep-seated desire for revenge against those he perceives as oppressors. His face is severely disfigured, matching his enigmatic and sinister demeanor. Skull Face manipulates events behind the scenes, weaving a complex web of deception and violence to achieve his goals, ultimately becoming a formidable adversary to Big Boss.