Mika Shimotsuki serves as Chief Inspector in the Criminal Investigation Department of the Public Safety Bureau. Born February 14, 2096, in Tokyo, her formative years at Oso Academy were marked by witnessing the deaths of close friends Kagami Kawarazaki and Yoshika Okubo at the hands of fellow student Rikako Oryo. This trauma cemented her lifelong animosity toward latent criminals and forged her rigid adherence to the Sibyl System's authority. Graduating in 2113, she became the youngest-ever Inspector to join the MWPSB, assigned to Division 01. Shimotsuki possesses reddish eyes and long brown hair, typically secured in a low ponytail with an orange hair tie. Her average-height frame is fit. Her professional attire evolved from a dark gray blazer, collarless white blouse, and dark pants as an Inspector to an orange blouse and thigh-length skirt as Chief Inspector. Field assignments see her in a blue CID jacket, while casual wear includes a brown hoodie. Initially abrasive and condescending toward Enforcers, Shimotsuki resented advice and refused to acknowledge errors. Her overconfidence and jealousy of colleague Akane Tsunemori's independent methods strained Division 01 dynamics. She lacked initiative, strictly complying with Sibyl's directives over independent judgment. Learning Sibyl's true nature as a collective of criminal minds intensified her obedience, which she later leveraged to undermine Tsunemori. Significant development occurred during the Sanctuary prison case ("Sinners of the System: Crime and Punishment"). Tasked with returning counselor Izumi Yasaka to a latent criminal facility, Shimotsuki and Enforcer Nobuchika Ginoza uncovered systemic corruption: prisoners were forcibly exposed to radiation harvesting nuclear waste. Shimotsuki recorded the warden's confession, publicly exposed the abuse, and killed the warden during the subsequent riot. This experience, influenced by Yasaka, fostered her first respectful recognition of a latent criminal's humanity. By "Psycho-Pass 3," as Chief Inspector overseeing Inspectors Arata Shindo and Kei Mikhail Ignatov, her leadership matured. She balanced protective concern with disciplinary sternness, granting operational latitude despite occasionally chastising rule-breaking, reflecting increased team trust. Conflicts with the Ministry of Foreign Affairs, particularly Frederica Hanashiro—who recruited Enforcers from Shimotsuki's unit—highlighted her lingering resentment toward external authority encroaching on her command. During the Komiya assassination crisis ("First Inspector"), she prioritized protecting the governor and her trapped team, demonstrating decisive crisis management. Key relationships trace her evolution: her hostility toward Ginoza shifted to mutual respect through collaboration. Lingering guilt and unexpressed feelings toward Kagami Kawarazaki suggest emotional vulnerability. Her dynamic with Tsunemori progressed from rivalry to conflicted acceptance, notably when Tsunemori returned as a statutory Enforcer under her command. Despite maturation, she retained core traits like blunt communication and steadfast Sibyl loyalty, though with greater nuance in applying judgment.