The Boss is a character in Metal Gear Solid 3: Snake Eater. She is was the greatest soilder of the Cold War (in the game). She obeyed every order and completed every mission.
She was unstoppable until she joined the Soviet Union in the Cold War. She had defected. Her apprentice; Naked Snake was given the order to take her down. After a long fight, Naked Snake ended The Boss' life. Naked Snake soon figured out that she was given the order to defect to the Soviet Union to figure out as much data as she could. The U.S. government then set a hit on her saying she defected. She obeyed her mission to the end.
She is a character in Metal Gear Solid 3: Snake Eater