Shinji Mikuni (御国 真司, Mikuni Shinji) emerges as the central antagonist in the 2019 film *City Hunter: Shinjuku Private Eyes*. A 26-year-old Japanese IT company president, he possesses ochre-colored dark hair and brown eyes. Mikuni’s childhood as a bullied straight-A student forged his obsession with control after Kaori Makimura rescued him. This trauma solidified his "Might Makes Right" philosophy and bred lasting resentment toward Shinjuku, where he later sought dominance. As an adult, Mikuni masterminded a plot using military-grade drone technology. He coerced Ai Shindo’s father into developing the "Mobius" drone-control system. The scientist’s suicide over ethical conflicts intensified Mikuni’s hunt for Ai, who held the system’s activation key. He deployed armed operatives to capture her across Shinjuku. Mikuni’s fixation on personal vengeance fractured his alliance with mentor Vince Ingrad. During a critical drone demonstration, he ignored strategic objectives to attack Ryo Saeba—Kaori’s partner and Shinjuku’s protector—causing operational failure. Vince denounced Mikuni’s leadership and moved to seize control, prompting Mikuni to kill him and embrace unchecked aggression. Mikuni rekindled his fixation on Kaori, attempting to exploit their past bond to secure her loyalty. When she rejected his ideals and refused to aid his power quest, he threatened her life. Kaori countered by condemning his path as a hollow pursuit of strength, exposing his fragility. His psychological collapse culminated after her final rejection. In the climax, Mikuni confronted the protagonists wielding a SIG-Sauer P230SL pistol. His defeat dismantled his reign, concluding his arc as the narrative repudiated his ideology.