Shion Karanomori works as an analyst for the Public Safety Bureau's Criminal Investigation Department, Division 01. She provides technical and analytical support for investigations, handling data analysis, evidence examination, and necessary hacking. Her latent criminal status restricts her from leaving bureau headquarters without an inspector's supervision, frequently requiring colleagues like Nobuchika Ginoza to escort her on external activities such as shopping.
Karanomori graduated from Toyama Higher Education with a Life Science major and entered Tokyo Medical School. She earned her medical license in February 2106 but left medical school later that year due to a deteriorating Psycho-Pass. Following rehabilitation, she was assigned to the Public Safety Bureau's Analytical Laboratory in August 2106. Her expertise as a physician was exceptional, yet her unstable mental state prevented her from continuing in medicine.
She displays a glamorous, occasionally sluggish demeanor and expresses dissatisfaction with perceived overwork at the bureau. Despite this, she approaches her job seriously and knowledgeably. Karanomori exhibits a playful side, often teasing colleagues like Yayoi Kunizuka and Arata Shindo, and shows sympathy in private interactions. She is bisexual and engages in flirtatious behavior, referring to individuals like Shinya Kogami as "sweetie."
Her most significant relationship is a longstanding romantic partnership with Yayoi Kunizuka. It began after Karanomori deleted a compromising video of Kunizuka seized by the bureau, notifying Kunizuka and initiating a sexual relationship shortly afterward. Karanomori demonstrates deep loyalty throughout their partnership, notably when, after being stabbed, she sent a message declaring her love for Kunizuka "until death." Following separations due to Kunizuka's departure from the bureau, they reunite during the Bifrost investigation, with Karanomori frequently expressing concern for Kunizuka's safety on missions.
Her character development culminates in *Psycho-Pass 3: First Inspector* during a terrorist attack on bureau headquarters. She plays a critical role in restoring internal communications and server operations despite encountering booby traps, including exposure to knockout gas. By the event's conclusion, her Psycho-Pass stabilizes sufficiently for her latent criminal status to be lifted, leading to her discharge from the bureau. She and Kunizuka agree to live together afterward.
Karanomori is characterized by several distinctive traits: she smokes regularly, adheres to the motto "Believe your instinct," favors the word "makeshift," and wears a signature outfit of a white lab coat over a red and black dress. Her physical attributes include a curvaceous build, wavy black hair dyed blonde, and a preference for red lipstick. She shares the perfume "Ombre Rose" with Kunizuka and maintains confidential details about her hobbies, weaknesses, and weight.