Ayano Aishi

her inheriting an incurable condition from her mother, Ryoba Aishi, that leaves her emotionless and with a feeling of being empty and incomplete. She experienced a surge of emotions for the first time upon meeting "Senpai" (Taro Yamada), but the feeling disappeared when he was not around, making her desperate to keep him to herself. Her backstory also includes her mother teaching her to clean blood at an early age and telling her stories of a "Senpai" throughout her childhood.