Kotono Shiunji

The youngest of five sisters in the Shiunji household, Kotono is a third-year middle schooler recognized as the group's idol. Naturally reserved and not particularly comfortable in social situations, she has a peculiar habit of retreating into a closet to collect her thoughts, earning her the nickname 'Closet Ghost.' She harbors feelings for the family's eldest son, Arata, that go beyond ordinary sibling affection. Though others often dismiss her emotions as mere misunderstanding, she remains steadfast in her heart, and when the moment calls for it, she reveals a surprisingly bold side that catches everyone off guard.