Futsuma Shoujo Charlotte

A group of classmates challenge their courage in an abandoned factory, where they encounter an evil spirit. Among them is Konoe Mizuki, who reveals herself to be Charlotte, an exorcist disguised as a nun. Charlotte begins to fight the evil spirits, but ends up facing a powerful demon named Melkis, who uses magic to manipulate the minds of her classmates. Despite being unarmed and vulnerable, Charlotte maintains her determination to fight. She summons her sacred weapons and, despite going through moments of intense hardship, continues to resist the demon Melkis.