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 a supernatural, 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 naughty things!" Because of that, Kako didn't tell him about his divine yorishiro or boundary and never met him again. (He even introduces Hanako to Akane and Guest as a vulgar, 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 turned into its future state. Because she caused so much trouble, Kako imprisoned her, but she escaped. She is a supernatural, 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-supernatural and half-human. Originally human, he became a Clock Keeper by signing a contract with them due to a setup by the Keepers on his middle school entrance ceremony day. 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 an act for his classmates, so everyone thinks he is a kind and good Vice President. He likes—no, loves—Guest so much that he even loves the air Guest breathes. 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 is said to use all 15 minutes at once. He usually wears glasses given to him by Teru that make supernaturals invisible. Clock Keeper Form: Wears a white suit and a navy blue robe. Only the inner back 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 positive and has a weakness for handsome men. She is Hanako's assistant. She is human. Her legs are quite thick, so she gets teased for having "daikon legs." She mainly 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 or a kitchen knife he keeps in his clothes. He is sly, playful, and has a talent for confusing people. He likes Nene and mainly hangs out with Kou and Nene. He calls Nene "Yashiro" and calls Kou "Kid."

Gender: Male Age: 15 (9th Grade) A middle school student and an exorcist, though he lacks talent for exorcism. He hides his Raigeki-zue (Lightning Staff) with an umbrella. He is the second son of the prestigious Minamoto family. He likes Nene and is the type to act before he thinks. He believes there are good supernaturals in the world. He 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. Usually kind and gentle, he becomes cold and sensitive toward supernaturals. He believes there is no such thing as a good supernatural. He is so talented at exorcism that he was called a prodigy at the age of eight. He is the Student Council President. Knowing that Akane is half-supernatural, he teases him for fun. (e.g., hanging him upside down from the ceiling with prayer beads.) However, since Guest is a girl, he doesn't bully her.