Marcus Fenix is the lead protagonist of the Gears of War series. He was formerly a prison inmate, he is now Humanity's last hope against the Locust scourge and the leader of Delta Squad.
Fenix is noted for having a famed military career, during which he played a notable part in the Pendulum Wars. Despite this, Fenix is left for dead in a dilapidated penitentiary, until Dominic rescues him at the beginning of Gears of War. When Lieutenant Kim is killed in battle by General RAAM, Marcus takes up the leadership of the group under the rank of "Sergeant".
In Gears of War 3, Marcus loses all of his family. His father Adam, and his best friend Dom. It is revealed at the end of Gears of War 3 that Marcus and Anya had some form of a relationship when she expresses her feelings to Marcus by holding his hand.In Gears of War 3 multiplayer, multiple versions of Marcus Fenix are available as player characters/skins. These include Classic Marcus, Unarmored Marcus and standard campaign Marcus.