Kaori Yuki is an helpful, mature girl that is a cute idol. She is the daughter of Reina Koize and Subaru Yuki and she loves running, singing, chocolate, sleeping, drawing, swimming and the beach. She is very kind, shy, loyal and mature girl that can come across as childish but she is often confused on what to do about her life.  She is very well-mannered and dislikes losing, stuck up people, roller-coasters, broccoli, giving up and her friends and family getting hurt. She came from the future into the past to stop a catastrophe from occurring She became an idol because both her parents are idol and she felt that had to follow in their footsteps.