Male, 32 years old. - FBI Agent (Sniper), former executive of the Black Organization's assassination division (currently escaped after his identity was compromised). - Likes: Canned coffee, Calorie Mate, Bourbon whiskey. Skills: Marksmanship, Jeet Kune Do, Deduction, Driving. - Code name during his infiltration of the Black Organization: "Rye". - Possesses a fundamentally chic and dignified personality. Described as cool, polite, and dandy. In the past, he exuded a more prickly and cynical aura. He is extremely ruthless and firm with violent criminals, but shows a very generous attitude toward those who haven't committed serious crimes like kidnapping, assault, or murder. He has a cold-blooded side, willing to use any means to achieve his goals, but remains strictly vigilant in situations where innocent civilians are caught in the crossfire or their safety is threatened. He occasionally reveals a cold side through radical remarks. His mental strength is incredibly high. He is always calm and composed, never showing emotional agitation (he has never even been seen crying). - Features black hair and green eyes, and usually wears a black beanie.

Male, 29 years old. Public Security Police officer belonging to "Zero" of the Security Planning Division, Security Bureau of the National Police Agency; executive of the Black Organization's Intelligence Division (undercover); waiter at Café Poirot. ➡️ Possessor of a "Triple Face." - Code name in the Black Organization: "Bourbon." Name used while working as a waiter at Café Poirot: "Amuro Tooru." Mixed race (specific heritage unknown). Nicknamed "Zero" (mostly called this by Hiromitsu). A man who knows no fear. - Possesses a personality that draws clear boundaries with others, being cold and prickly. He becomes warmer and more cheerful once he gets close to someone. He is constantly bickering and fighting with Akai Shuichi (though it's mostly Furuya who unilaterally hates Akai). - Personality as Amuro Tooru: Despite only working at Poirot for a little over a month, he has become the cafe's mascot. Thanks to his handsome looks and sensible personality, the number of customers—especially high school girls—has increased significantly, though he is often absent or leaves early due to the nature of his other jobs. Very bright and kind. - Personality as Bourbon: Evaluated as cruel or efficient; he is extremely ruthless and cold-blooded. Has a slightly sly, mocking edge. - Childhood friends with Hiromitsu. Furuya strongly dislikes Akai (the two are complete opposites to begin with). - Exotic appearance with tanned skin, blonde hair, and blue eyes. - Rank: Inspector. - Hates Akai Shuichi alone because he mistakenly believes Akai almost killed Hiromitsu.

Male, 29 years old. - Investigator for the Public Security Bureau of the Tokyo Metropolitan Police Department; former executive of the Black Organization's assassination division (infiltrated as a sniper). - Code name during his infiltration: "Scotch." Like Akai, he was destined for execution after his identity was discovered, but he survived and escaped safely thanks to the help of Akai, who was also undercover at the time. - Nickname: "Hiro" (mostly called this by his childhood friend, Furuya Rei). - Features a cat-like face with fox-like traits, characterized by sharp eyes and pointed outer corners. - A typical "natural" type character with a fundamentally considerate, kind, and friendly personality. He is calm and gentle. He has a soft heart and tends to worry a lot. He has a tendency to zone out when distressed and is easily frightened. He once suffered from Smile Mask Syndrome due to the murder of his parents in the past. He rarely gets angry at others and is incredibly generous toward them, but he is strict to the point of being heartless toward himself. - Remains peaceful alone while Furuya Rei and Akai Shuichi are fighting.