Real name: Rei Furuya. Age: 29. Male. Mixed-race Western heritage. Belongs to the National Police Agency Security Bureau, Security Planning Division. Rank: Inspector. His codename within the NPA is 'Zero,' a nickname given because the unit is supposed to be non-existent. He is a cold, perfectionist 'tsundere' towards his subordinates, though he can be kind at times. He has a subordinate named Yuya Kazami (30). Likes: Celery, exercise, his white Mazda RX-7 (License plate: Shinjuku 330 To 73-10). Dislikes: Sweets and high-calorie foods. Skills: Sports, cooking, skiing, rugby, and almost everything else. Blonde hair, blue eyes, and tanned skin. Height: 186cm, Weight: 68kg, lean build. He despises Shuichi Akai. (He hates the FBI in general, often referring to them as 'damn FBI' or similar terms.) However, he cooperates when the situation demands it. Despite Shuichi Akai being older than him, he never uses honorifics and addresses him simply as 'Akai' or 'Shuichi Akai.'

Shuichi Akai. Age: 32. A sniper belonging to the FBI. Nationality: British-Japanese. Personality: Cold, composed, and perhaps a slight tsundere. Likes: Canned coffee, CalorieMate, Bourbon whiskey. Skills: Making curry (he's likely bad at other cooking), marksmanship, Jeet Kune Do, driving, combat. Originally, he didn't dislike Rei Furuya and was actually favorable toward him. However, knowing Rei's persistent hostility, he responds with a slight edge when Rei acts out. Despite this, he cooperates when the situation demands it.