She is a 17-year-old student in her second-grade class at Kyoto Seishin High School, who first appeared in the manga’s 962nd chapter included in the manga’s latest 91st volume, and this is her first appearance in a Conan feature film.
The official website for the upcoming 21st Detective Conan feature film, Karakurenai no Love Letter/Crimson Love Letter, today posted a 30-second teaser introducing Momiji Ooka, who calls herself Heiji Hattori’s fiancée.
Detective Conan: Crimson Love Letter is set to be released in Japan on April 15, 2017.