Rumi Kinoshita is a cheerful and diligent high school student working part-time at Pia Carrot, a popular family restaurant. Known for her friendly demeanor and dedication, Rumi quickly becomes a favorite among the customers and staff. Her character plays a crucial role in the series by showcasing the everyday challenges and joys of balancing school life with part-time work. Through her interactions, Rumi helps to highlight the importance of teamwork, responsibility, and the pursuit of one's dreams, making her a relatable and endearing character in the series.