Teppei Sugo is a taller-than-average male with a muscular build, brown eyes, and short black hair. His hairstyle evolved from spiky during military service to slicked-back in later roles, and he consistently wore attire appropriate to his evolving occupations. Born in Bunkyō, Tokyo, he graduated from Edogawa Municipal Daini Junior High School in March 2107 and enrolled at Tokyo Metropolitan Nakano High School's Faculty of Information Engineering, Major in Communication, graduating in March 2111. Sugo entered the Ministry of Defense in April 2111, assigned to the Navy Drones Unit of the National Borders Defense System. He transferred to the Drones Development Division in November 2112. Serving as a pilot and communications officer for the 15th joint task force, he formed close bonds with squad members Itsuki Otomo and Otomo's wife Rin, the ground commander. A pivotal mission resulted in Sugo unknowingly dropping VX gas, causing the deaths of his entire squad, including Otomo. This incident caused severe psychological distress, clouding his Psycho-Pass, leading to his resignation from the Ministry of Defense in May 2113 due to Psycho-Pass deterioration. He underwent confinement at Adachi Municipal Psycho-Pass Correction and Medical Care Center until his release in November 2113. Assigned as an Enforcer in Division 02 of the Public Safety Bureau's Criminal Investigation Department in December 2113, Sugo transferred to Division 01 in November 2114. He demonstrated a gentle, soft-spoken demeanor yet unwavering dedication to duty, often acting with disregard for personal safety, likely stemming from guilt over his squad's deaths and the accidental killing of Inspector Risa Aoyanagi. During a drone attack investigation, he shielded Inspector Mizue Shisui and Enforcer Akira Yamatoya from an explosion, sustaining severe injuries. Sugo's relationship with Inspector Aoyanagi began when he was suspected in drone attacks; he later served under her in Division 02, developing respect for her leadership. He tragically fired the shot that accidentally killed her during an operation, intensifying his guilt and self-sacrificial tendencies. His interactions with Enforcer Tomomi Masaoka started tensely but evolved into mutual trust; Masaoka encouraged Sugo to pursue law enforcement if therapy failed, influencing his path. Sugo also formed a professional bond with Inspector Nobuchika Ginoza. Initially strained after Aoyanagi's death, their relationship improved during a drone test site incident, leading to mutual respect and later collaboration. By 2118, Sugo became a Special Investigator within the Ministry of Foreign Affairs' Foreign Affairs Operations Department, Suppressing Action Division, working alongside Ginoza. He demonstrated sharp instincts, physical prowess, and mental fortitude. His skills included military knowledge, drone piloting expertise, proficiency in karate and soccer, and a 50m running time of 6.50 seconds. His emergency contact is his elder sister, Masumi Sugo. His favorite food is katsu-don, and he dislikes ikura-don. He regularly meditates and exercises, sleeps six hours nightly, and possesses 2.0 eyesight in both eyes. His favorite literary work is Shiba Ryoutarou's "Cloud Over the Slope," and his motto is "Indomitable perseverance."