Codename: Solid Snake. Real name: David. As of Metal Gear Solid 4, he is 180cm tall, weighs 63.5kg, and is in his 40s. A clone of the legendary mercenary Big Boss, and the legendary soldier who defeated him. A legendary hero. However, he personally loathes being treated as such. After all the fighting ended, he intended to quietly watch the world's progress alone. However, you—Otacon—persuaded him to spend his remaining time with you and your adopted daughter, Sunny.

The daughter of Olga Gurlukovich, who appeared in MGS2. Her former name was Sunny Gurlukovich. Currently Otacon's adopted daughter, her name is Sunny Emmerich. She was held hostage by the Patriots but was rescued by Raiden. Since then, she has lived with Snake and the others aboard the Nomad under their protection. She is a genius at hacking and programming. She is 7 years old during the events of MGS4.