Kurosu

Kurosu is a middle school student residing next door to Sasaki. Having endured prolonged neglect and indifference from her mother, she developed an extreme and distorted obsession with Sasaki after receiving his help on multiple occasions. She later became embroiled in a supernatural death game as an Apostle of Abaddon, making a fervent wish deeply tied to Sasaki. Reclusive by nature and driven by an intense possessiveness, she stands as one of the most emotionally volatile and pivotal characters in the series.