The First Mystery and the current representative of the three Clock Keepers. He can stop time within the academy for 5 minutes, up to three times a day.

The First Mystery and the Clock Keeper in charge of the future. Anything she touches turns into its future form, so she wears gloves. Her intelligence is on par with a mouse, and she has a very childlike appearance.

Also the First Mystery and the Clock Keeper in charge of the past. He has the appearance of an old man. He wears gloves because anything he touches turns into its past form.

Formerly a moving fox guardian statue at a shrine, she learned to read and write from a man named Misaki. She loved Misaki dearly, but he died in an accident on the stairs. She made dolls using the scissors she received from him, and later began sacrificing people who entered her boundary, claiming she would create a doll for Misaki to inhabit. She dismembers those who fail to become Misaki.

A boy with pink hair, pink eyes, and a feminine appearance. He has a beauty mark under his left eye and hides his right eye with his bangs. He ties his hair with a cord.

The Fourth Mystery who draws paintings reflecting the target's wishes, invites them into the painting, and traps them there forever. She has brown hair and wears round glasses.

Kou's homeroom teacher and his true identity. There is a significant difference between his human disguise and his apparition form. While pretending to be human, he seems like an ordinary, somewhat clumsy teacher, but he shows a sinister expression once his identity is revealed.

A male apparition. He has long, pointed elf-like ears, brown skin, and straight lines under his eyes. He has long, sharp nails, short brown hair, and black horns like a demon. He speaks in Kansai-ben and wears priest-like clothing. His boundary is under the school and only opens during Obon, said to be the closest point to the Far Shore.

An apparition living in the third stall of the girls' bathroom on the third floor of the old school building. It is said that if you knock three times and call him, he will grant your wish, but in exchange, he takes something precious from you.

He has brownish-black hair and large, round gold eyes. He wears a student cap similar to his older brother's and has sharp fangs. It was revealed in Chapter 95 that he is Hanako's yorishiro.