Kogoro Mōri is a former police detective who now runs the Mouri Detective Agency in Beika Town. He is the father of Ran Mouri and is separated from his wife, Eri Kisaki, though they are not divorced. After leaving the police force, he struggled to establish his career until he took in Conan Edogawa, a child who is secretly the shrunken high school detective Shinichi Kudo. Conan frequently uses a tranquilizer dart to render Kogoro unconscious and then mimics his voice to solve cases, earning him the public nickname Sleeping Kogoro. Despite this unconventional method, Kogoro possesses a genuine sense of justice and is fiercely protective of his family. He is often depicted as lazy, short-tempered, and prone to excessive drinking, gambling, and chasing after beautiful women, but he reveals sharp instincts and determination when his loved ones are in danger. His relationship with his daughter Ran is close yet conflicted, as she manages the household often strained by his habits, while his bond with Eri involves frequent arguments but underlying affection, shown when he acts selflessly to help her. Kogoro treats Conan as a troublemaker but ultimately cares for him as a member of the household. He maintains a familiar rapport with former colleague Inspector Megure and other police officials, who rely on him for assistance. Though he rarely solves cases independently, he occasionally demonstrates capable reasoning when personal matters are involved. His notable abilities include mastery of judo, especially his shoulder throw, and exceptional marksmanship, both developed during his time as a police officer. In the special, Kogoro is deeply involved in the storyline, contributing his skills and emotional weight to the unfolding events while balancing his flawed personality with moments of reliability.