Ruri Yukimura

She is 7 years old and the younger sister of Shōichirō Yukimura. She is a first-grade elementary school student who has a strong admiration for princesses. She loves playing pretend as a princess, and her dream for the future is to become a princess and find her destined prince. Since she feels that her older brother Shōichirō Yukimura doesn't act like a prince, she refers to him as "the boy next door." On the other hand, the moment she meets Takumi Usui, she falls in love with him and starts calling him "Lord Takumi." However, she eventually realizes that she is not Takumi Usui's princess and decides to step back.