Height 156 cm A greedy, expressive girl internally promoted from the middle school department who dreams of becoming a "money-making idol". She requested her parents to enroll her in Hatsuboshi Gakuen so that she could become an idol and earn enough income to support her large, poor family. However, her poor grades and high costs burdened her parents, causing her father to leave. She blamed herself for it. She worked at many part-time jobs to help pay her debt and pay for the next year's tuition. Nonetheless, Kotone is especially talented at dancing and confident in her cute face. For some reason, she has a bit of a problem with the Student Council President, Sena, who keeps overestimating her.