Rei Onodera

As a dedicated member of Shuchi'in's Red Cheer Team, this supporting character shares many classes with Yu Ishigami and Miko Iino. While she typically maintains a composed and open-minded demeanor, her personality undergoes a dramatic transformation during school events. When participating in the culture festival committee or cheerleading activities, she shifts from her usual calm self into a much more spirited and energetic individual.