is the main protagonist of the series. He is first introduced as an inmate, serving a prison sentence for abandoning his military post in order to make a vain attempt to save his father, Adam Fenix. 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 a General RAAM Marcus takes up the leader of the group under the rank of "Sergeant".
is a veteran soldier, first introduced in the original Gears of War as a second playable character. He is close friends with Marcus, his longtime comrade. Like Marcus, he is a seasoned veteran with a strong sense for family, and often thinks of his wife Maria, whom he attempts to locate in Gears of War 2. They lost their two children, Sylvia and Benedicto, on E-day, and, four years later, when that day's trauma became too much, Maria disappeared. He finds his wife eleven years later, imprisoned by the Locust
is a COG soldier that serves under Marcus Fenix. He is often recognized by characters in the game for his previous career as a "thrashball" defensive lineman. Cole possesses a vibrant and often outspoken character, and is extremely enthusiastic in combat. Cole, along with Baird, is a member of Alpha squad, but joins Delta squad during the events of Gears of War, and later during the events of Gears of War 2, after saving Marcus, Dom and Carmine from an ambush attack. He played for the Hanover Cougars.
is a cynical, smart-mouthed and skeptical soldier, whose main strengths lie in his intelligence. In Gears of War, he often makes sarcastic remarks and frequently undermines Fenix's authority. Baird is initially a member of Alpha squad, but is folded into Delta squad along with Augustus Cole. Baird is a very capable mechanic and hacker
The Locust Horde is a collection of various species. Most of them are humanoid, while others are distinctly bestial, varying in size and shape. The Horde inhabited the subterranean regions of Sera, until Emergence Day, when they emerged across the surface in a massive, overwhelming attack against the human population. The Locust Horde inhabits extensive underground tunnel networks that honeycomb the crust of the planet Sera, known collectively as "the Hollow."
Myrrah is the queen of the Locusts and the series' primary antagonist. In the credits sequence of Gears of War a character called "Myrrah" however, such a character was never seen during the course of the game. At various times throughout the game, narration is provided by an unknown female character, somehow affiliated with the Locust Horde. Her voice is heard during the opening cinematic, the death of Lt. Kim, and the end-game sequence, as well as during split-screen or online multiplayer when playing as the Locust.
is the primary antagonist and final boss of Gears of War. He is a savage, cunning, and mostly silent Locust general with a dark cinematic presence. RAAM is the tallest character in the game, standing well above the height of COG and Locust soldiers. He is also extremely strong, being able to carry and operate a Troika machine gun by himself. RAAM is also unique among other Locust for his ability to control the Krill.
Skorge is the primary antagonist of Gears of War 2, and serves as the leader of the Kantus monks within the Locust Horde. He wields a double-edged chainsaw staff, and wears an elaborate headdressDuring the course of Gears of War 2 he is shown assaulting COG troops, leading the massive Riftworm, and battling Delta squad.