Kogoro Mouri operates the Mouri Detective Agency in Beika as a private investigator. He is the father of Ran Mouri and the estranged husband of lawyer Eri Kisaki, having separated around ten years ago without finalizing a divorce. Previously, he served in the Tokyo Metropolitan Police Division One alongside Inspector Megure, where his exceptional marksmanship stood out despite lacking investigative acclaim. He later transferred to the arson division under Inspector Yuminaga before leaving the force. Non-manga sources suggest an incident where he shot Eri in the leg to save her during a hostage situation contributed to his departure, though core material does not confirm this. Kogoro exhibits stark personality contrasts. Typically, he displays laziness, professional ineptitude, and an inflated view of his detective skills, often overlooking evidence and reaching incorrect conclusions. He makes blunt remarks about clients, indulges heavily in alcohol, smoking, gambling, and obsesses over idol Yoko Okino, filling his office and bedroom with her merchandise—behavior that embarrasses Ran and deters reconciliation with Eri. However, he becomes focused and capable when cases involve personal stakes, especially concerning Ran or Eri. His deductive reasoning and grasp of human dynamics sharpen in these scenarios, though they remain inferior to elite detectives like Shinichi Kudo. He harbors an unwavering sense of justice, explicitly rejecting murder regardless of motive. Physically, he is tall and reasonably fit with high cheekbones, short slicked-back black hair featuring two loose forehead strands, and a distinctive short mustache. He retains judo expertise from his days as Beika University's team ace, effectively employing throws like the ippon seoi nage. Films and later manga depict his mild acrophobia. His career surged after Conan Edogawa began covertly assisting him. Conan uses a stun-gun wristwatch to tranquilize Kogoro and a voice-changing bowtie to impersonate him, solving complex cases during Kogoro’s unconscious states. This earned Kogoro the moniker "Sleeping Kogoro" for his trance-like deductions. Though he occasionally solves cases independently—particularly those involving acquaintances or family—over 400 solved cases stem from Conan’s interventions. Kogoro seldom questions these frequent unconscious episodes. In "Lupin III vs. Detective Conan The Movie," Kogoro partners with Interpol Inspector Koichi Zenigata after Count Keith abducts Ran to Vespania, where she impersonates Princess Mira Julietta Vespaland. Kogoro leverages his official status to enter the kingdom. During the investigation into Queen Sakura’s murder, thief Arsène Lupin III impersonates Kogoro. When Conan attempts to tranquilize the disguised Lupin, he accidentally incapacitates Zenigata instead. Lupin then collaborates with Conan under Kogoro’s identity, exposing Duke Gerard Musca Vespaland as the murderer of the queen and orchestrator of Prince Gill’s staged suicide. Kogoro’s acrophobia surfaces during events at Tokyo Skytree. Post-crisis, he and Ran are celebrated as Vespania’s saviors.