Takao Hiyama

Hidden beneath a heavy trenchcoat, mask, and hat, this mysterious educator serves as a lethal predator stalking the streets near Yuki’s school. As the owner of the Killer Diary, he utilizes a specialized notebook that predicts the exact location of his next target, allowing him to launch preemptive strikes against other diary holders. Though his personality remains largely enigmatic due to minimal dialogue, his presence as a serial killer introduces a dangerous, aggressive element to the survival game.