Кірішіма Котоне

She is the twin sister of Akari and the older of the two. Despite her gentle and sweet behavior, she is a bit sadistic, delusional, and an obsessive stalker. She has a crush on Junpei mainly because of his misfortunes and shows jealousy if another girl gets too close to Junpei. Only Kotone and her sister Akari know that Junpei is cursed.