- "I was born in a small village. I was still a child when we were raided by soldiers: foreign soldiers. Torn from my elders I was made to speak their language. With each new post, my masters changed, along with the words they made me speak. With each change, I changed too. My thoughts, personality, how I saw right and wrong... words... can kill."
- ―Skull Face[src]
Skull Face was the heavily scarred former commander of the military group XOF. He secretly commanded XOF from the 1960s then he left his unit in the first aftermath up until his death in the end of the Nationalist Wars, at first acting as a covert ally of Naked Snake and later as Cipher's elite strike force until he finally took control of the organization away from Zero. Skull Face also created the Parasite Unit, a group of parasite enhanced super soldiers, that would act as his chief enforcers and high level operatives for the XOF during the 1980s. He suffered extensive injuries in his youth which caused his characteristic facial scars, burns, and discolorations, most notably a Glasgow smile. He was killed by Akio Yujo during the Mission to De'ijkki Earth