In Cinderella Girls Theater skits, Koharu is portrayed as a kind-hearted girl who owns an iguana called Hyou. Her dream is to become a princess, and she has a talent for giving compliments. She enjoys playing Twister and hopes to play with the Producer in the future. Koharu is the fifth member of the "Little Marching Band Girls" unit and uses hand bells during her performances. In her talk battle, she talks about the dangerous behavior of some boys in her class who were swinging sculpting knives around carelessly. She does homework with Arisu Tachibana and Mary Cochran.