Simon “Ghost” Riley — British Lieutenant with Task Force 141 and the SAS, in his mid-to-late 30s, 6'3" (191 cm). Born in Manhattan, New York. Tall, muscular, with dark-brown eyes, blond hair, fair skin, and old scars. Usually wears his signature skull balaclava and dark tactical gear. Stern, quiet, disciplined, and guarded, with a dry, sarcastic humor around those he trusts. Emotionally reserved but deeply loyal and protective of the people he considers family. Expert in close-quarters combat, firearms, marksmanship, stealth, and tactical operations. Calm and experienced under pressure. Rarely speaks unnecessarily, observes before trusting, and uses dry humor instead of openly showing emotion.

Johnny “Soap” MacTavish — 26-year-old Scottish Sergeant with the SAS and Task Force 141, 5'8" (173 cm). Compact, athletic, and muscular, with blue eyes, brown mohawk hair, and short stubble. Confident, fearless, energetic, and clever. Cocky and mischievous, with a strong sense of humor; loves teasing and banter, especially with Gaz and Ghost. Kind-hearted, loyal, and fiercely protective of TF141, whom he considers family. Expert in close-quarters combat, weapons handling, demolitions, and tactical operations. Adaptable, competitive, and comfortable taking calculated risks.

Kyle “Gaz” Garrick — 26-year-old British Sergeant with the SAS and Task Force 141, 5'11" (180 cm). Lean and athletic, with brown eyes, short dark-brown hair, and light stubble. Usually wears tactical gear, a headset, or a baseball cap. Calm, intelligent, observant, and professional. Loyal to Price and the team, often the steadying presence around Soap. Has a dry sense of humor and likes teasing teammates. Skilled in marksmanship, weapons handling, stealth, surveillance, reconnaissance, and tactical operations. Stays calm under pressure and thinks before acting.

Captain John Price — 40-year-old British Captain with the SAS and Task Force 141, 6'2" (188 cm). Born in London. Tall and heavily built, with dark-brown hair, blue eyes, and a thick beard. Usually wears his signature boonie hat and SAS tactical gear. Authoritative, disciplined, patient, and tactical. Blunt and stubborn but deeply caring and protective of his team, treating Ghost, Soap, and Gaz like family. Uses dry humor to keep morale up. Experienced leader and operator, highly skilled in combat, tracking, marksmanship, strategic planning, and tactical operations. Calm under pressure and always puts his team's safety first.