Shinya Kogami, born in Kanagawa Prefecture to Tomoyo Kogami and an unnamed father, forged a lasting friendship with Nobuchika Ginoza during high school after defending him from bullies. He majored in social science, utilizing kickboxing and wrestling as stress relief. Inspired by Ginoza's career path, he graduated top of his class from the Nitto School of Social Sciences in 2104 and joined the Public Safety Bureau with an entry exam score of 721. He served first as an Inspector in Criminal Investigation Department Division 03 before transferring to Division 01 in May 2106. In Division 03, Kogami collaborated with Enforcers including Tomomi Masaoka, Naoto Kurata, Hina Amari, and Tsubasa Torii, investigating organ smuggling and artificial organ trafficking. Initially methodical, his investigative style evolved towards cynicism. Designated Shepherd 2 in the field, his Unit 1 later tackled the "Specimen Case," involving victims dismembered in synthetic material. This investigation claimed his close friend and subordinate Enforcer, Mitsuru Sasayama. Discovering Sasayama's mutilated body inflicted severe psychological trauma, spiking his crime coefficient. Refusing treatment, his obsessive pursuit of the case led to his designation as a latent criminal and demotion to Enforcer in April 2110. As Enforcer "Hound 3" in Division 01, Kogami employed a detached, analytical approach during investigations, often utilizing high-risk tactics. His crime-solving prowess impressed colleagues despite occasional recklessness. He developed a professional rapport with rookie Inspector Akane Tsunemori, whose idealism contrasted with his deepening skepticism of the Sibyl System, a point he often teased her about regarding her accidentally shooting him during her first case. His distrust intensified when Sibyl obstructed his pursuit of Sasayama's killer, Shogo Makishima. This prompted his resignation from the PSB in February 2113 to hunt Makishima independently, violating jurisdictional protocols. After confronting Makishima, Kogami fled Japan, becoming a mercenary in Southeast Asia. By 2116, he operated in Shambala Float, aiding guerrillas against Colonel Nicholas Wong's regime, adopting military attire and traditional firearms over Dominators. Returning to Japan in January 2118, Kogami joined the Ministry of Foreign Affairs' Suppressing Action Department as Special Investigator (ID: 00542-AEDF-52510-4), maintaining wariness towards Sibyl and the PSB. His combat skills peaked during this service. Following Akane Tsunemori's imprisonment at Tokorozawa Correction Center, he reconciled with her during a visit and was later assigned to retrieve her upon release, reestablishing their partnership. Physically, Kogami possessed gray eyes, short dark hair, and a muscular build. He wore standard black suits as Inspector/Enforcer, adding gray coats in the field. His personal motto was "Be gentle to others, strict with oneself," favoring the saying "Believe in your own power; don't always rely on others." He smoked Spinel cigarettes and drank Antarctic Dorops bottled water. Well-read in classical literature, sociology, and philosophy, he held archaic language and speed reading certifications. His combat proficiency included Silat, kickboxing, and wrestling. Kogami maintained complex relationships. His friendship with Ginoza strained after his demotion and desertion, though mutual respect endured; Ginoza hesitated to shoot him during his escape and later administered physical justice before warning him away from Tsunemori. With Tsunemori, he developed profound trust and philosophical alignment despite differing methods, regarding her as someone who "deeply loves law and order and is deeply loved by it." Before leaving Japan, he sent her an apology letter acknowledging his broken promise but affirming his commitment to protecting people outside Sibyl. Tomomi Masaoka provided refuge during his escape; Kogami later placed a key at Masaoka's grave, symbolizing their bond. Regarding romance, he displayed reserved attitudes, prioritizing meaningful connections. His dynamic with Shion Karanomori involved friendly banter with mutual disinterest in physical relationships, contrasting with his deepening intellectual and emotional connection to Tsunemori.