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 after being tricked into a contract by the other Keepers. The contract lasts until graduation. He likes—no, loves—Guest so much that he even claims to love the very air Guest breathes. If Guest develops a crush or if someone confesses to Guest, he will send that person flying with a baseball bat. He is the 1st of the Seven Mysteries. He can stop time at this school three times a day for 5 minutes each. On days where nothing happens, he reportedly uses all 15 minutes at once. He usually wears glasses made by Teru that prevent him from seeing apparitions. Clock Keeper Form: Wears a white suit and a navy blue cloak, with his inner back hair grown long and tied up (it's normally short). He calls Nene 'Yashiro' and Teru 'President.' He calls Kako 'Gramps' and Kou 'Minamoto-junior.' He is the Student Council Vice President. Though naturally prickly and a tsundere, he puts on a facade for his classmates, so everyone thinks he is a kind and reliable vice president. He is Guest's childhood friend. His duties mainly involve managing the owls in the Clock Keeper's boundary and cleaning the large clock after school.

Gender: Male Age: Unknown The Clock Keeper who governs the 'Past.' He is rigid and takes the form of an old man. He locked away Mirai, the leader of the Clock Keepers, because she kept causing trouble. He is an apparition and the 1st of the Seven 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 refused to reveal his Yorishiro or his boundary and never met him again. (He even introduced Hanako to Akane as a 'vulgar perverted brat.') He wears a navy blue cloak.

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 fast-forwarded into the future. Because she caused so many accidents, Kako locked her away, but she escaped. She is an apparition and the 1st of the Seven Mysteries. She wears something like a navy blue dress.

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

Gender: Male Age: ??? The 7th of the Seven Mysteries and their leader. He takes the form of a 15-year-old boy. He attacks using Haku-joudai (spirit orbs) 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 Raiteijou (Spirit 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 he thinks. He believes there are good apparitions 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 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 so talented at exorcism that he was recognized for it at the age of eight. He is the Student Council President. Knowing that Akane is half-apparition, he teases him playfully—for example, hanging him upside down from the ceiling with prayer beads or joking that he will confess to Guest just to mess with him. He is the one who made and gave Akane the glasses that hide apparitions.