Ran Mouri, daughter of private detective Kogoro Mouri and lawyer Eri Kisaki, experienced her parents' separation at age seven and actively seeks to reunite them. She shares a deep childhood bond and romantic connection with Shinichi Kudo, beginning in kindergarten when he crafted her a Sakura badge after she was left without one. Key childhood events include sneaking into Teitan Elementary at six with Shinichi to investigate a monster rumor, encountering an individual who gifted them a coded leather wallet. That same year, she met Fusae Campbell, who lent her an umbrella and requested she later purchase one of Fusae's designer purses—a promise Ran fulfilled years on. A pivotal moment occurred during a New York City trip with Shinichi roughly one year before the main series. There, she encountered Vermouth disguised as a serial killer. When Vermouth nearly fell to her death, Ran saved her despite the danger, earning Ran the enduring nickname "Angel" from Vermouth. This trip solidified her romantic feelings for Shinichi. Ran displays a complex personality: patient, kind, nurturing, and deeply caring for loved ones. She highly values justice and exhibits bravery under threat, remaining calm against firearms or flames. However, she possesses an overwhelming temper when angered, often channeled through her martial arts. She acts impulsively to protect others, sometimes causing near-miss misunderstandings. Despite her combat prowess, she harbors an intense, irrational fear of the supernatural, freezing in horror-related situations. Ran remains largely oblivious to others' romantic attention due to her unwavering feelings for Shinichi. His prolonged absence causes significant emotional pain, yet she chooses to wait, trusting his promise to return. Domestically, she is highly self-sufficient, managing household finances, cooking, and cleaning due to her father's frequent irresponsibility. She also greets clients and ensures Kogoro maintains professionalism. Her most notable ability is exceptional martial arts proficiency. A karate black belt and captain of Teitan High's karate club, she wins regional tournaments in her age group. Her skills are acknowledged as comparable to world-class martial artist Makoto Kyogoku, with whom she can synchronize attacks. She demonstrates remarkable physical strength, prying open elevator doors, subduing larger opponents, and scoring 400psi on a punching machine—surpassing trained male boxers. Her agility allows dodging bullets, swatting insects with precise kicks, and performing parkour. She possesses high stamina and endurance, sustaining minimal injury from blunt force. Beyond combat, Ran excels in household management, cooking, sewing, and music, including piano and singing. She exhibits extraordinary luck in games of chance, lotteries, and gambling, never documented to lose. Her observational skills contributed to solving cases independently on at least three occasions, noticing subtle inconsistencies like a victim's swapped footwear or behavioral quirks in disguised individuals. She speaks functional English, requiring slower-paced conversation for comprehension. In *The Scarlet Bullet*, she attends the World Sports Games pre-opening and the "Hyper Linear" maglev train unveiling. She boards its maiden voyage alongside Conan Edogawa and others. During the journey, helium vapor incapacitates her during an MRI sabotage incident at Nagoya International Airport. Later, she uses her karate to disarm Riko Rokui, who attempts to stab artist Ryuji Kasuga after learning Kasuga intended to return to working exclusively with Riko, diffusing the assistant's misplaced jealousy. Separately (Episode 1032), Kasuga scouts Ran for a portrait. Accompanied by Conan, who investigates after previous models were attacked, Ran attends the session. When Rokui attempts to stab her in misguided revenge, Ran neutralizes the threat with a karate kick. The episode concludes with Ran working as a karate mascot for a shop. Persistent doubts about Conan Edogawa's true identity surface multiple times. She observes his resemblance to Shinichi and similar deductive abilities. Tactics to allay suspicions include staged phone calls from Shinichi (using Professor Agasa's voice-changing bowtie), Yukiko Kudo claiming Conan is a distant relative, and elaborate ruses involving Ai Haibara disguised as Conan while Shinichi appears separately. One critical incident occurs when Conan leaves his cellphone unattended; Ran emails Shinichi, immediately triggering a vibration in Conan's phone. Though she later fails to find the email on his device (due to deletion), the event fuels ongoing skepticism. She also donates blood to a critically injured Conan, leveraging their shared rare blood type—a moment nearly confirming her suspicions before being diverted by another deception.