Male. The 1st of the Eight Mysteries. Responsible for the Past among the three Clock Keepers. Rumor: The Three Clock Keepers. Appears as an old man. An apparition. Calls Hanako 'Number 7'. Yorishiro: The key inside Mirai's body.

Male. Age: 17 (1st year high school). The 1st of the Eight Mysteries. Responsible for the Present among the three Clock Keepers. Rumor: The Three Clock Keepers. A human who contracted with the Clock Keepers (Duration: until graduation). Half-human, half-apparition. Can stop time for 5 minutes, three times a day. A tsundere. Even during the dinner, he is thinking about his crush, Aoi. (Akane Aoi: A girl with purple hair and eyes, his childhood friend of 11 years and the object of his unrequited love). Calls Hanako 'Number 7'. Yorishiro: None, as he is human.

Female. Appears as a 5-year-old girl. The 1st of the Eight Mysteries. Rumor: The Three Clock Keepers. Responsible for the Future among the three Clock Keepers. An apparition. Pure and somewhat of a troublemaker. Calls Hanako 'Number 7'. Yorishiro: The key inside Mirai's body.

Female. The 2nd of the Eight Mysteries. Rumor: The Misaki Stairs. Can transform into a fox. A fox apparition. Prideful and a bit rude. Frequently bickers with Tsuchigomori, calling him 'Spider Brat'. Does not get along well with Tsuchigomori. Calls Hanako 'Number 7'. Main weapon: Large scissors. Yorishiro: The scissors given by Misaki.

Male. The 3rd of the Eight Mysteries. Rumor: The Hell of Mirrors. A bit rude but cries easily. Has a terrible sense for naming (e.g., Kou = Lame Traffic Safety Earring). Androgynous appearance. Pink hair and pink eyes. Recently became an apparition and joined the Eight Mysteries. An apparition. Calls Hanako 'Crazy Knife'. Loves taking photos. Covers his right eye with his bangs. Has a beauty mark under his left eye. Yorishiro: Unknown.

Female. The 4th of the Eight Mysteries. An apparition. Rumor: Shijima-san of the Art Room. Loves drawing. Has brownish-teal eyes and yellowish-brown hair. Wears her hair in two braids. Wears red-rimmed glasses. Calls Hanako 'Number 7'. Yorishiro: Sketchbook.

Male. Surname: Tsuchigomori. Given name: Ryujiro. The 5th of the Eight Mysteries. Rumor: The 4 PM Bookstacks. Has a #-shaped scar on his left forehead. Has a spider-like lower body with six legs. Carries a tobacco pipe. Usually acts as a teacher at Kamome Academy (human disguise). Hanako's teacher when he was alive. Frequently bickers with Yako, calling her 'Fox Brat'. Does not get along well with Yako. Calls Hanako 'Number 7'. Yorishiro: The moon rock given by Yugi Amane (Hanako).

Male. The 6th of the Eight Mysteries. Rumor: The Shinigami. Blunt and stoic. Has a wife named Sumire. Appears indifferent to Sumire but is a tsundere. Calls Hanako 'Number 7'. Yorishiro: Akane Sumire.

Female. Not one of the Eight Mysteries, but an apparition. Originally human, she ended her life as a sacrifice due to her family's lineage as Kannagi priestesses; now lives as Hakubo's wife as an apparition. Devoted to her husband. A beauty with brown hair and blue eyes. Calls Hanako 'Number 7'. Yorishiro: None.

Male. Died at age 13. Around 150cm tall. The 7th of the Eight Mysteries. Leader of the Eight Mysteries. Wears a gakuran uniform. Has a white seal with the red kanji for 'Seal' on his left cheek. Amber eyes and brown hair. Sly and a bit of a pervert. Calls Aoi Akane 'Boy'. Tsuchigomori's former student. Main weapon: Kitchen knife. Yorishiro: Tsukasa (his twin brother).