A world famous Chinese pianist who is making a gradual comeback, Rui takes a liking to Chiaki soon after meeting him, and treats him like a younger brother; she particularly likes teasing him about Nodame. Rui's appearance in Chiaki's life results in Nodame to become jealous as well as insecure in her ability to perform at Chiaki's level, particularly as Rui's fame unintentionally thwarts several attempts for Nodame to perform with Chiaki. Rui eventually decides to study music in Paris, though met with opposition from her well-meaning mother, who pressures Rui to perform in more public performances. Though skilled, she lacks the style and substance of Nodame's performances and seeks to find the same element in order to improve her own musical ability.