Kei Nozaki, a 16-year-old with black spiky hair and dark brown eyes, anchors the detective agency as its most grounded member. His steel-blue hoodie with a diagonal zipper, dark-gray jeans, and chunky sneakers mirror his practical nature. While his calm rationality tempers colleagues like Hiroshi Inaba’s hair obsessions or Yūta Sasaki’s flamboyant schemes, dormant aggression surfaces when provoked, unleashing moves like the Peasant’s Punch or Commoner’s Kick against foes such as Don Valentino. Born May 16 under Taurus with blood type O, Kei’s childhood in a modest wooden house shaped his financial pragmatism. The agency’s 900-yen hourly wage drew him in, though financial instability lingers. He navigates eccentric teammates with weary tolerance, intervening to curb Yūta’s violent plots or Hiroshi’s reckless whims. A paradoxical cat lover allergic to fur, he dotes on a hairless Sphynx cat, channeling feline fervor into bursts of willpower—expelling parasites or dominating table tennis matches when enraged. During Valentino mafia cases, he prioritizes strategy over impulse, analyzing risks before confronting Don’s goat-like visage or the eerie familiarity of the boss’s hideout, which mirrors his childhood home. Loyal yet candid, Kei respects Hiroshi’s mentorship but challenges his perilous enthusiasm. He monitors Yūta’s chaos with cautious camaraderie and engages clients like Kuniharu Ogino with guarded professionalism. Across missions, his steady presence remains the agency’s compass amid turbulence.