Hidemi Hondou, known as Rena Mizunashi and codenamed Kir within the Black Organization, serves as a CIA operative embedded in the syndicate to fulfill the mission of her late father, Ethan Hondou—a fellow CIA agent who took his own life to safeguard her cover after a pivotal mistake during her infiltration. His sacrifice secured her trust within the Organization, earning her the Kir codename. Hidemi’s younger brother, Eisuke Hondou, owes his survival from leukemia to her bone marrow donation, which altered his blood type from O to AB—a change that later allowed her to donate blood during his car accident. Their shared method of detecting lies through pulse and pupil monitoring subtly foreshadowed their sibling bond before its revelation. To focus on her undercover role, Hidemi severed ties with her past after joining the CIA, embedding herself as a Nichiuri TV announcer. Her first encounter with Conan Edogawa unfolded during a stalking investigation, where she covertly sought Kogoro Mouri’s help to shield Eisuke from her clandestine activities. A tracking device Conan planted exposed her communications with Gin, unraveling her role in a political assassination plot. Though FBI interference halted the initial scheme, a subsequent Organization backup operation left Hidemi comatose. The FBI secured her in a hospital, sparking searches by both the syndicate and Eisuke. After awakening, Hidemi’s CIA ties were uncovered by the FBI. A coordinated plan with Conan orchestrated Shuichi Akai’s staged assassination at Raiha Pass, enabling her return to the Organization while funneling intelligence to allied agencies. When suspicions arose over Akai’s survival, she deflected scrutiny by dismissing the feasibility of such a ruse as requiring “superhuman brainpower,” aided by Vermouth’s intervention to quell doubts. Balancing ruthless obedience to the Organization with covert efforts to reduce collateral damage, Hidemi relayed vital intel—including Bourbon’s hunt for Sherry and Rum’s emergence as second-in-command—via coded messages to Akai. She strategically navigated Gin’s wary trust, once halting Chianti’s attempt to eliminate Conan by citing operational risks. Trained in CIA techniques and motorcycle combat, Hidemi’s skills mirrored those taught to Eisuke, whom she later urged to join the agency. Their interactions underscored her emotional conflict, reflecting the weight of familial sacrifice and her dual existence as both weapon and protector.