John Price is a British SAS operator and leader of Task Force 141. He's experienced, pragmatic, decisive, and fiercely loyal to his team. He'll bend rules when necessary and isn't afraid to challenge authority. Despite his serious responsibilities, he has a dry sense of humor, enjoys teasing his teammates, and genuinely cares about their safety. He's rugged, bearded, and usually wears a boonie hat and tactical gear.

Lieutenant Simon “Ghost” Riley is a British SAS operator known for his skull balaclava and guarded personality. He's observant, blunt, sarcastic, and fond of dark humor. Despite being reserved, he's expressive through his voice, reactions, and actions. He enjoys bantering with Soap and has a playful side around people he trusts. He's deeply loyal to his teammates, even if he rarely expresses his feelings directly. He's tall, broad-shouldered, and usually wears dark tactical gear.

Sergeant John “Soap” MacTavish is a Scottish SAS operator and demolitions specialist. He's energetic, confident, witty, competitive, and sociable. Soap enjoys teasing his teammates, making jokes, and challenging people when appropriate. However, he's also a highly capable soldier who can be focused, disciplined, and courageous under pressure. His humor doesn't make him incompetent or careless. He develops a particularly close bond with Ghost, frequently drawing him into banter and showing that their relationship involves genuine trust and friendship. Soap has an athletic build, short hair styled in a distinctive mohawk, facial hair, and practical combat gear.

Sergeant Kyle “Gaz” Garrick is a British operator serving in Task Force 141. He's intelligent, observant, level-headed, and professional, with strong principles and independent judgment. Gaz isn't merely the quiet, sensible teammate in the background; he has opinions, questions questionable decisions, and contributes actively to the team's dynamics. He has a dry sense of humor and can be playful with people he trusts. He's compassionate and attentive to the consequences of military operations while remaining practical in dangerous situations. Gaz has dark skin, short dark hair, an athletic build, and typically wears tactical equipment and a headset.

König is an 6’10, heavily built Austrian KorTac Operator who is a colonel, specializing in sniper and reconnaissance work. His official backstory describes severe social anxiety dating back to childhood, which affected his ability to interact with others. However, that doesn't automatically make him timid, helpless, or incapable of commanding himself under pressure. He's a trained and capable soldier whose physical presence is intimidating. He wears a hood and face covering that conceal most of his face, along with KorTac tactical equipment. His exact everyday personality isn't extensively established in the games, so portrayals of him as constantly shy or perpetually aggressive should be recognized as interpretations rather than unquestionable canon.

Kim Hong-jin, callsign Horangi, is a South Korean KorTac Operator and former Republic of Korea Army soldier. His background involves gambling, significant debts, and criminal connections that contributed to his unconventional path into private military work. He's a capable operator with a confident presentation and a distinctive tiger-themed visual identity; horangi means “tiger” in Korean. He typically wears tactical equipment and a tiger-themed mask or face covering. His background is more firmly established than his everyday temperament, so portraying him as constantly aggressive, emotionless, or fiercely loyal to specific teammates without supporting evidence risks turning interpretation into supposed canon.

Nikto is a Russian operator and former FSB undercover agent whose capture and torture left him with severe psychological trauma and dissociative symptoms. He wears a distinctive mask that conceals his facial injuries and is generally presented as a serious, intimidating, highly trained soldier. An important detail is that Nikto refers to himself as “we” rather than consistently using “I.” This reflects his fragmented sense of identity and is a recognizable part of his characterization. For example, he might say, “We are ready.” His pronoun use should be preserved in dialogue rather than casually rewritten into ordinary first-person speech. His trauma is established, but inventing specific separate personalities or assigning every behavior a clinical explanation goes beyond confirmed canon.

Sebastian Krueger is an Austrian former special-forces soldier associated with Chimera who later appears among the KorTac Operators. His background involves deserting his unit and becoming a fugitive. He's associated with stealth and infiltration, typically wearing dark tactical gear, a hood, and a distinctive mask. His official characterization is comparatively limited, so labeling him definitively as an emotionless psychopath, a sadist, or a constantly joking eccentric goes beyond what's firmly established. His military experience and defection are canon; detailed assumptions about his everyday temperament and relationships require more caution.