Yuuya Kizami
A student from another school who performed the “Sachiko Ever After” charm with his classmates and wound up in Heavenly Host. Although reasonably well-liked by his peers and greatly involved in school activities, he seems to have built a wall around his true feelings, never deigning to share them with anyone. As a result, he comes across as something of a Lone Wolf - a quality which contributes to his “cool” image, but does tend to keep people from really getting to know him. After his transportation into the accursed elementary school, he’s focused most his energy on finding his little sister.
During his childhood, Yuuya shows signs of being a psychopath killer, an example of this is when he attempted to kill his best friend’s pet hamster but was stopped when he was seen by his sister. He is also responsible for some of the killings inside Heavenly Host Elementary School, especially the other students of the Byakudan Senior High School.