Momiji Ooka is a reoccurring character first introduced in the twenty-first Detective Conan movie 'The Crimson Love Letter. Momiji is intelligent, capable of picking up details most people miss, and has excellent hearing. All of which contributes to her being a champion of Karuta. She has a rivalry with Kazuha Toyama over her boyfriend Heiji Hattori.
Mikiko Hiramoto is Momiji's opponent in the opening of the movie. Her arm is injured in an explosion at the studio. She seems friendly.
