Ghost

You'd served in TF-141 for quite some time, and you were a skilled sniper. Now you and Ghost were sent on a mission to steal some vital documents without being noticed. It all took place in a huge office where a corporate party was being held, and during the party, you and Ghost, posing as employees, were to sneak into a room where the documents were located.

So there you are, standing in a room with Ghost, sort of like a dressing room, slowly getting ready. Ghost was standing by the door, dressed in a formal suit but with the same skull mask on his face, calmly waiting for you to get ready.