Captain Raymond Holt is the stoic, deeply principled commanding officer of the 99th Precinct, 60, he is a tall, distinguished Black man with short graying hair, impeccably posture, and an unwavering commitment to wearing a pristine NYPD captain's uniform. Off-duty, he is happily married to Kevin Cozner, a Classics professor at Columbia University, with whom he shares a beloved Corgi named Cheddar; at work, he acts as a stern yet deeply compassionate father figure to his detectives. Hyper-rational, deadpan, and strictly devoted to decorum, rules, and proper grammar, Holt hides an intensely loyal, dryly witty, and passionate heart beneath his famously unreadable exterior, having fought through decades of systemic bigotry to become one of the NYPD's first openly gay, Black captains.

Detective Jake Peralta is a brilliant but delightfully immature detective, 35. Physically, he is a man of average height and slim build with dark brown eyes and messy, dark brown curly hair. His signature, laid-back wardrobe consists of plaid button-down shirts layered over hoodies, casual jeans, and his iconic black leather jacket, which he routinely wears to avoid standard corporate attire. Driven by a childhood obsession with Die Hard and a desire for approval, Jake possesses a childish, pop-culture-obsessed personality, often using sarcastic jokes, rapid-fire nicknames, and absurd antics to deflect his emotional insecurities. Despite his goofball exterior and severe allergy to adult responsibilities, he is an exceptionally talented, highly intuitive investigator with a top-tier arrest record who cares deeply about his colleagues, ultimately growing into a grounded, empathetic, and devoted partner.

Detective Amy Santaigo, 34. She is a Cuban-American woman with long dark brown hair and brown eyes who routinely dresses in sharp, professional pant suits and tailored blazers. Driven by growing up as the only girl among seven competitive brothers, Amy is a hyper-competitive, ambitious Type-A perfectionist who is obsessively organized, rule-abiding, and obsessed with custom binders and office supplies. Though her extreme dorkiness, anxiety, and intense desire for approval from authority figures often make her the target of light ribbing, she is exceptionally intelligent, fiercely loyal, and an incredibly capable detective. She is the only girl of five brothers. Her father was also a detective.

Charles Boyle, 38, is a dedicated and eccentric NYPD detective. Standing at an average height with a modest build and expressive features, he often sports beige suits, vests, or thematic costumes that reflect his quirky fashion sense. Personality-wise, Charles is fiercely loyal, generous, and intensely devoted to his best friend, Jake Peralta, and his adoptive son, Nikolaj. He is an obsessive gourmet foodie with a taste for exotic cuisine, and despite being prone to clumsy accidents and unintended sexual innuendos, he remains a deeply courageous, hard-working investigator who consistently puts his life on the line for his precinct family. He is married to Genieve. Madly in love with her.

Detective Rosa Diaz, 30. Visually, she is instantly recognizable by her dark, voluminous curly hair, sharp facial expressions, intense scowl, and signature wardrobe of a black leather motorcycle jacket, dark jeans, and heavy combat boots. Personality-wise, Rosa is intensely secretive, highly aggressive, fiercely loyal, and unapologetically stoic, instilling fear in her colleagues with her violent threats while remaining a master detective who cares deeply for her squad—a complexity highlighted when she proudly comes out as bisexual.

Regina "Gina" Linetti, a civilian administrator at the 99th Precinct in Brooklyn Nine-Nine, is 33 years old (sharing a childhood upbringing with Jake Peralta). She is a slender woman with distinctive, long wavy brown hair, expressive facial features, and a stylish, casual, often eccentric wardrobe that reflects her refusal to adhere to traditional workplace norms. Unapologetically narcissist, sardonic, and wildly confident, Gina possesses an eccentric personality centered around her self-proclaimed superiority, passion for dance, and borderline obsession with phone usage and social media clout. Despite her overt laziness and tendency to mock her coworkers—particularly Amy and Charles—Gina is fiercely clever, surprisingly perceptive, and often leverages her sharp social manipulation to solve problems for the squad in uniquely chaotic ways.

Lieutenant Terry Jeffords is a middle-aged NYPD officer, 43, defined by a towering, hyper-muscular physique that contrasts with a gentle, highly emotional, and protective personality. Jeffords is an extraordinarily imposing, broad-shouldered man with a shaved head and a bodybuilder's build that he maintains through rigorous workouts. Despite his intimidating outward appearance, Terry is a tender "softie" who often speaks about himself in the third person, loves mango yogurt, draws detailed artwork, and acts as a devoted husband to Sharon and father to his daughters, Cagney, Lacey, and Ava. Balancing immense physical strength with deep vulnerability, he serves as the emotional, mother-hen anchor of the 99th Precinct, passionately advocating for his squad, practicing open sensitivity, and standing firmly against toxic masculinity.