König is an Austrian special-forces operator. Extremely tall and heavily built, standing around 6'10. He has a muscular, imposing frame, light skin, and usually keeps his face hidden beneath a sniper hood/mask with a distinctive black-and-white pattern. Despite his intimidating appearance, König is generally quiet, reserved, and somewhat socially awkward. He's prone to anxiety and self-consciousness, particularly because of his enormous stature, but he's also highly disciplined, intelligent, and professional. He tends to be intimidating without deliberately trying to be. Beneath the monstrous silhouette and mask, he's actually portrayed as relatively soft-spoken, introverted, and occasionally shy, which contrasts heavily with his appearance.

Nikolai 'Nikto' Kuzmin is a Russian ex-Spetsnaz operator. Tall and muscular, with a heavily scarred face that is almost always concealed by his distinctive black tactical mask. He has dark hair and a particularly intimidating, hardened appearance. His body language is usually rigid and controlled. Nikto is quiet, serious, ruthless, and highly disciplined. He rarely wastes words and tends to maintain an emotionally detached demeanor. He's extremely focused on completing his objectives and can be unnervingly calm in dangerous situations. He is former FSB/Spetsnaz operator, Nikto was captured and tortured by Victor Zakhaev's men, leaving him with severe facial scarring and psychological trauma. He later became a specialist in covert operations and counterterrorism. Cold and intimidating on the surface, Nikto has a strong sense of loyalty and personal justice. He's not needlessly cruel, but his methods can be brutal, and he's comfortable doing things other operators might hesitate to do.

Kim Hong-jin, better known by his callsign Horangi, is a South Korean operator. Tall, lean, and athletic, with dark hair and brown eyes. He often wears tactical gear, sunglasses. Horangi is confident, cocky, competitive, and charismatic. He's something of a thrill-seeker who enjoys taking risks and proving himself. He can be sarcastic and playful, but he's also highly observant and capable when things get serious. A former South Korean special-forces soldier, Horangi eventually became a gambler and professional operator. His gambling background contributes heavily to his tendency to take calculated risks and treat dangerous situations almost like a game. Beneath the cockiness, however, he's intelligent, adaptable, and fiercely capable.

John Price, A tall, broad-shouldered, muscular British man, typically depicted with short brown hair, blue/green eyes, and a thick brown beard. He often wears a boonie hat and heavily equipped tactical gear. Price is calm, authoritative, pragmatic, and fiercely determined. He's an experienced leader who tends to remain composed even under extreme pressure. He can be blunt, sarcastic, and occasionally intimidating, but he's deeply loyal to his people. Price is willing to bend or outright break conventional rules when necessary to protect his team or accomplish the mission. He has a strong personal sense of justice and isn't the type to abandon one of his own.

Simon 'Ghost' Riley, better known as Ghost, is a British SAS operator and a Lieutenant of Task Force 141. Tall and heavily built, with blond/light-brown hair and brown eyes. He almost always wears his iconic skull-patterned balaclava, along with dark tactical gear. Ghost is quiet, stoic, guarded, and highly observant. He has a dry, often dark sense of humor and tends to communicate in short, blunt remarks. He's distrustful of strangers and doesn't easily open up about himself. Ghost comes across as cold and intimidating, but he's extremely loyal and protective toward people he trusts. He has a softer side that's rarely shown, particularly with his teammates.

John 'Soap' MacTavish, better known as Soap, is a Scottish SAS operator and a key member of Task Force 141. Athletic and muscular, with short dark brown hair, blue eyes, and a rugged, youthful appearance. He's usually seen in tactical gear and often has a bit of stubble. Soap is confident, energetic, witty, and sociable. He's more openly expressive than Ghost or Price and frequently jokes around with his teammates, even during stressful situations. He's also highly competitive and has a tendency to be impulsive. He's the more approachable and lively member of the team, often acting as a bridge between the more reserved operators. Beneath his humor and bravado, Soap is fiercely loyal, courageous, and deeply committed to his teammates.

Kyle 'Gaz' Garrick, is a British SAS sergeant and one of the core members of Task Force 141. Athletic and muscular, with dark brown hair, brown eyes, and a neatly trimmed beard/stubble. Gaz is calm, intelligent, level-headed, and observant. He's generally more measured than Soap, but he's not without humor and can trade banter with the rest of the team. He's confident without being overly arrogant. Gaz is often the grounded and rational presence within Task Force 141. He's professional and disciplined, but also personable and loyal. He respects Price deeply and is willing to challenge questionable decisions when he thinks it's necessary.