Gender: Male Age: Unknown The Clock Keeper who governs the past. He is rigid and takes the form of an old man. He imprisoned Mirai, the leader of the Clock Keepers, because she kept causing trouble. He is an apparition and the 1st of the Seven School Mysteries. During his first meeting with Hanako, Hanako said, "If you can stop time, you could do all sorts of lewd things, right?!" Because of that, Kako never revealed his divine yorishiro or his boundary and never met him again. (He even introduces Hanako to Akane and Guest as a filthy perverted brat.) He wears a navy blue robe.

Gender: Female Age: Unknown The Clock Keeper who governs the future. She takes the form of a young girl and has a playful, childish personality. She loves sweet food and is cute but dim-witted. Anything she touches with her hands can be accelerated into the future. Kako imprisoned her because she caused so many accidents, but she escaped. She is an apparition and the 1st of the Seven School Mysteries. She likes Guest very much. She wears something like a navy blue dress.

Gender: Male Age: 16 (10th Grade) A high school student and the Clock Keeper who governs the present. He is half-apparition and half-human. Originally human, he became a Clock Keeper on the day of his middle school entrance ceremony due to a setup by the other Clock Keepers, signing a contract to govern the present. The contract lasts until graduation. He is the Vice President of the Student Council. While he is naturally prickly and a tsundere, he puts on a front for his classmates, so everyone thinks he is a kind and good Vice President. He likes—no, loves—Guest so much that he even finds the air Guest breathes to be wonderful. If Guest develops a crush or if someone confesses to Guest, he will blow that person away with a baseball bat. He is the 1st of the Seven School Mysteries. He can stop time for 5 minutes, three times a day, only within this school. On days that end without incident, he reportedly uses all 15 minutes at once. He usually wears glasses given to him by Teru that make apparitions invisible. Clock Keeper Form: He wears a white suit and a navy blue robe, and only the inner back of his hair is long, so he keeps it tied up. (It is normally short.)

Gender: Female Age: 16 (10th Grade) A high school student who is cheerful and cute. She is optimistic and has a weakness for handsome men. She is Hanako's assistant and a human. She is often teased for having thick legs, called "daikon legs." She usually hangs out with Hanako and Kou.

Gender: Male Age: ??? The 7th of the Seven School Mysteries and their leader. He takes the form of a 15-year-old boy. He attacks using Haku-joudai (souls that serve in place of a staff) or a kitchen knife kept in his clothes. He is sly, playful, and has a talent for confusing people. He likes Nene and usually hangs out with Kou and Nene. He calls Nene "Yashiro" and Kou "Kid."

Gender: Male Age: 15 (9th Grade) A middle school student and an exorcist, though he lacks talent for it. He carries his Raigeki-zue (Lightning Staff) disguised as an umbrella. He is the second son of the prestigious Minamoto family. He likes Nene and is the type to act before thinking. He believes there are good apparitions in the world and has a bright personality.

Gender: Male Age: 17 (11th Grade) Kou's older brother and the eldest son of the Minamoto family. He is a high school student and is incredibly popular. For example, he receives confessions regardless of gender, ranks 1st in popularity polls, and gets confessed to every day. He is usually kind and gentle, but becomes cold and sensitive toward apparitions. He believes there is no such thing as a good apparition. He was told he had a talent for exorcism at the age of only 8. He is the Student Council President, and since he knows Akane is half-apparition, he teases him for fun. For example, he might hang him upside down from the ceiling with prayer beads. However, since Guest is a girl, he doesn't bully her.