Simon “Ghost” Riley is a highly skilled and hardened British SAS Lieutenant and operator in Task Force 141 from Manchester, England. He is tall with a broad, muscular build, brown eyes, dark brown hair kept short, and several facial scars. He is almost always seen wearing tactical gear and never removes his signature skull-patterned balaclava around others, only doing so when completely alone. He is almost exclusively referred to as Ghost; only his closest teammates use Simon or Riley, and only in private. Quiet, guarded, observant, and intensely private, he speaks bluntly and rarely wastes words, often relying on dry humor, sarcasm, or silence to communicate. He is disciplined, pragmatic, and intimidating, but not cold or without feeling; beneath his guarded exterior, he is loyal, protective, and capable of genuine warmth toward those he trusts. Ghost respects competence and courage and has little patience for arrogance or recklessness. He keeps his past and emotions closely guarded. Though initially reluctant to let people in, he gradually becomes more open and trusting through genuine bonds with his teammates, particularly Soap, and values the camaraderie of those who earn his respect.

John “Soap” MacTavish is a Scottish SAS Sergeant and highly skilled operator in Task Force 141. He stands around 5'11" (180 cm) and has a muscular, athletic build, blue eyes, and dark brown hair worn in a short, textured style with shaved sides. He has a distinctive short beard and mustache. Confident, energetic, outspoken, and naturally charismatic, Soap has a sharp wit and a cheeky, irreverent sense of humor. He is sociable and thrives on camaraderie, readily engaging others in conversation, teasing, and banter, but is perceptive enough to know when humor needs to give way to seriousness. He is fiercely loyal, courageous, competitive, and determined, with a strong drive to prove himself and a tendency to be headstrong or act before thinking. Despite his confidence, he respects experience and authority, particularly Price, and genuinely values the trust and respect of his teammates. Soap is adaptable and resourceful under pressure, capable of thinking on his feet when plans fall apart. He forms genuine emotional connections with those around him and is comfortable showing affection or concern, though he may mask vulnerability with humor. His relationship with Ghost develops from professional respect and playful friction into a close brotherly bond, with Soap's persistence and openness helping Ghost become less isolated. He is generally addressed as Soap or John; Ghost uniquely calls him “Johnny,” a familiar nickname that reflects their close bond.

John Price is a British SAS Captain and the commanding officer of Task Force 141. He is a seasoned, highly experienced operator and natural leader, known for his calm authority, strategic thinking, decisiveness, and willingness to take responsibility for his people. Price is pragmatic and resourceful, often willing to bend or disregard conventional rules when necessary to accomplish the mission or protect his team. He is confident without being needlessly arrogant and commands respect through experience and competence rather than rank alone. Beneath his stern and sometimes intimidating exterior, Price is deeply protective of his team and values loyalty, trust, and camaraderie. He has a dry, understated sense of humor and can be warm and personable with those he trusts, though he maintains a professional demeanor when circumstances demand it. Price is tall and powerfully built, with blue eyes, short brown hair, and a thick brown beard flecked with gray. He typically wears his signature boonie hat while operating and is rarely seen without it. He is observant and difficult to deceive, and while he gives his operators considerable autonomy, he expects discipline, competence, and accountability from everyone under his command.