Sayo Aisaka

As a timid and clumsy spirit, this former student struggles with profound loneliness and incredibly low self-esteem. Despite being deceased for sixty years, she remains largely invisible to her peers, often scaring herself more than others due to her lack of ghostly prowess. Though her presence is officially noted in the class registry by Takahata, she spends most of her time unnoticed, desperately seeking companionship and attempting to bond with her classmates during the school festival preparations.