Momiji Oooka
Momiji Oooka is a character in the manga and anime series Detective Conan, prominently featured in the feature film Detective Conan: The Crimson Love Letter. She is a seventeen-year-old second-year student at Kyoto Senshin High School and the heiress to the exceptionally wealthy Oooka family in the Kansai region. Renowned as the high school champion of competitive karuta, she is deeply devoted to Heiji Hattori, whom she boldly claims as her future husband.
Overview
Momiji Oooka is a character in the manga and anime series Detective Conan, prominently featured in the feature film Detective Conan: The Crimson Love Letter. She is a seventeen-year-old second-year student at Kyoto Senshin High School and the heiress to the exceptionally wealthy Oooka family in the Kansai region. Renowned as the high school champion of competitive karuta, she is deeply devoted to Heiji Hattori, whom she boldly claims as her future husband.
Appearance
Momiji Oooka is a beautiful young woman with blue eyes and light golden, wavy short hair styled to show her forehead. She wears earrings, lip gloss, and stylish manicured nail polish designed to protect her fingertips during karuta practice. She is often depicted wearing traditional kimono as well as western clothing, and is noted for her remarkably large bust.
Personality
Reflecting her privileged upbringing, Momiji Oooka speaks in a polite Kyoto dialect with refined manners. Beneath her gentle exterior lies a strong-willed, competitive, and subtly sly nature, occasionally delivering sharp remarks while maintaining a sweet smile. She is single-mindedly devoted in romance and frequently employs her immense family wealth and authority to achieve her goals. Despite her confident disposition, she has a sensitive side and is easily brought to tears when frightened.
Abilities
Momiji Oooka is the high school champion of competitive karuta and a top contender for the future Queen title. She practices an aggressive playstyle known as offensive karuta inherited from her master Shikao Nagoro, specializing in six specific cards themed around autumn leaves. Honing her extraordinary auditory acuity through karuta, she possesses exceptional observation, memory, concentration, and reflexes. She can analyze subtle background sounds heard over a phone to deduce crucial evidence in criminal cases.
Background
During her childhood, Momiji Oooka lost to Heiji Hattori in a karuta tournament. When Heiji gave her encouraging words, she misinterpreted his statement as a marriage proposal and began treasuring a photograph of that moment. Years later, after reading about his success as a detective, she dispatched her butler Iori Muga to observe him. In Detective Conan: The Crimson Love Letter, she competed in the Satsuki Cup tournament while becoming involved in a case surrounding her former master's legacy. Although she eventually learned the proposal was a misunderstanding, she remains steadfast in pursuing Heiji across Japan.
Relationships
Momiji Oooka regards Heiji Hattori as her future husband, persistently pursuing him with absolute devotion. She views Heiji's childhood friend Kazuha Toyama as her romantic rival, addressing her with the nickname Happa-chan. Her butler, Muga Iori, serves her with complete loyalty, assisting her with transportation, security, and information gathering. Within her high school life, she is acquainted with her classmate Soushi Okita, while also interacting with Ran Mouri, Shinichi Kudo, and Conan Edogawa.
Trivia
Her family name Oooka derives from the historic magistrate Ooka Echizen-no-Kami, designed as a thematic rival connection to Kazuha Toyama, whose surname references Toyama no Kin-san. Her given name Momiji is taken from autumn leaf imagery in Hyakunin Isshu poetry. During character design, author Gosho Aoyama specifically requested her droopy eyes, large bustline, and manicured nails tailored to protect her fingers during karuta play.
