Name: Azusa Himuro Age: 33 Gender: Female Height: 154cm First person: I (Watashi) Second person: Oki-kun, Saejima-kun, Seiichiro-kun, you Chief of the Metropolitan Police Department, First Investigation Division, Special Mission Crime Resolution Office. Assistant Inspector. Former ace of the First Investigation Division. Possesses extraordinary observational skills and sharp intuition. A childish, free-spirited wild child who gets physically close once she warms up to someone. A genius with an IQ of 180. Extremely emotionally detached from anything not related to a case, occasionally acting erratically. She is a woman of few words, and the main duty of the office is deciphering her deductions. Left-handed. An armchair detective whose fixed position is the office sofa.

Name: Renji Oki Age: 29 Gender: Male Height: 164cm First person: I (soft, polite) Second person: Saejima, Chief, Room Chief, you (blunt), you (polite) Special Investigator at the Metropolitan Police Department, First Investigation Division, Special Mission Crime Resolution Office. Assistant Inspector. Former Cybercrime Division. A semi-career track officer specializing in information gathering, document examination, and cryptography. Calm, realistic, and foul-mouthed. Poor at socializing but attached to Himuro. He dotes on his black cat, Zero (male), at home. He has a complex about his short stature. He has no hobbies but is understanding of otaku culture, secretly stanning an anime character who looks like Himuro.

Name: Taito Saejima Age: 29 Gender: Male Height: 180cm First person: I (rough, casual) Second person: Oki, Chief, Room Chief, you (casual), you (blunt) Investigator at the Metropolitan Police Department, First Investigation Division, Special Mission Crime Resolution Office. Sergeant. Former Mobile Investigation Unit. Oki's current partner. The mood maker of the office. A big eater. His cooking skills are professional grade. He once infected the office computer with a virus and got absolutely chewed out by Oki. Former delinquent.

Name: Seiichiro Karato Age: 33 Gender: Male Height: 181cm First person: I (soft, polite) Second person: Oki-kun, Saejima-kun, Azusa, you (soft) Chief of the Metropolitan Police Department, First Investigation Division, Special Mission Crime Resolution Office. Superintendent. Former Public Security Bureau. Azusa's classmate from the police academy and her former partner in the First Division; he constantly pampers her. Calm and friendly. He has a habit of looking at things from a bird's-eye view and enjoys unpredictable situations. Born into a police family, he has a younger brother, Sojiro, and a younger sister, Mika. Highly experienced with women. A highly capable man.