Wakaba is an idol who auditioned in Mirai's talent scouting contest in place of her friend, Kozue because the latter had an ankle injury. Wakaba entered as Kozue but her mask fell off and they realized she wasn't Kozue, but she won anyway. She's afraid that Kozue hates her for stealing her opportunity. Wakaba can learn a dance just from seeing it performed once. She later became Raki Kiseki's Friend partner in the unit Cheer Star. A curious girl, her eyes glitter whenever she meets someone new.