Child Spirits (児童霊, Jidō rei) refer to three students of Heavenly Host Elementary School who became victims of the kidnapping and murder incident on September 18th, 1973. Since then, they roam the halls of Heavenly Host Elementary School:
- Ryou Yoshizawa: The first victim and the only male child spirit. He was stabbed in the abdomen until his organs were forcefully dug out.
- Tokiko Tsuji: The second victim and the youngest of the child spirits. She was stabbed in the head multiple times until her upper jawline had completely been severed from her head.
- Yuki Kanno: The third victim and the oldest of the child spirits. She was stabbed repeatedly in the left eye until it turned into mush and was left bleeding to death in horrible agony.