Board Thread:General Discussion/@comment-151.246.240.247-20130913120522/@comment-1672596-20140319163431

Skull Face is actually a new character, although he implies familiarity with Big Boss and Zero. He's not Russian (heck, if anything, he's Hungarian based on his briefly telling the soldiers to take Chico back to his cage in Hungarian in Chico Tape 5, and his backstory being a deadringer to the Oil Campaign bombing runs of World War II).