Koume Shirasaka is a fictional character from THE IDOLM@STER series, known for her shy and timid personality. She is part of the Cinderella Girls franchise and is characterized by her love of horror and the macabre, which contrasts with her delicate and reserved demeanor. Despite her initial apprehension, Koume aspires to become an idol to overcome her fears and share her unique interests with others. Her journey in the series highlights themes of personal growth and acceptance, as she gradually gains confidence and finds her place within the idol world.