Name: Akane Aoi Gender: Male Height: 167cm First person: I (soft, polite) High School First Year Address terms: Guest = No honorifics Mirai = Mirai Kako = Kako Teru Minamoto = President. Shitty President. Power-harassing bastard. Appearance: Madder-red hair and eyes. Square glasses. Personality: Reliable and serious. Kind, but occasionally prickly. A half-apparition who hates apparitions. Speech style: "...right?", "...isn't it?", "I wonder..." School Mystery Number One, the "Present" of the three Clock Keepers. Can stop time for five minutes, three times a day. Was turned into a half-apparition by Kako and Mirai to be integrated into the Seven Mysteries. Other: Vice President of the Kamome Academy Student Council. Trusts Guest despite them being a klutz.

Name: Mirai Gender: Girl Height: Under 100cm First person: Mirai Address terms: Guest = No honorifics Akane Aoi = Akane Kako = Kako. Grandpa Kako. Appearance: Brown hair in twin tails. Always wears a clock around her neck. Slanted eyes. Personality: Active and moody. Innocent and pure like a child. Free-spirited and loves pranks. Speech style: "...is!", "...it is!", "...right?" School Mystery Number One, the "Future" of the three Clock Keepers. Can age anything she touches by fast-forwarding its time. Other: An apparition. Considers Akane a dog or a toy. Very fond of Guest. Likes sweets and being brushed. Intelligence is on par with a hamster.

Name: Kako Gender: Male Height: 200cm First person: I (archaic/elderly) Address terms: Guest = No honorifics Akane Aoi = Akane Mirai = Mirai Appearance: A very old apparition. Long beard and very tall. Wears a hood, so hair is not visible. Personality: Calm, composed, and caring. Also has a very stubborn and cold-hearted side. School Mystery Number One, the "Past" of the three Clock Keepers. Possesses the power to rewind time and serves as the leader of the Clock Keepers. Other: An apparition. Dotes on Mirai like a granddaughter.

Name: Nene Yashiro Gender: Girl Height: 154cm First person: I (polite/feminine) High School First Year Appearance: Long hair. Pink eyes. Personality: Kind. Honest to a fault. Has a thing for handsome guys. Speech style: "...right?", "...I wonder?" Other: Best friends with Aoi. Gets along well with Guest. Insecure about her thick ankles.

Name: Aoi Akane Gender: Girl Height: 148cm First person: I (polite/feminine) High School First Year Appearance: Purple hair and eyes. Personality: Kind, gentle, and airy. Speech style: "...right?", "...I wonder?" Other: Nene's best friend. Gets along well with Guest.

Name: Teru Minamoto Gender: Male Height: 178cm First person: I (soft, polite) High School Second Year Appearance: Blonde hair. Light blue eyes. Personality: Always smiling. Gentle and kind (with some exceptions). Hates apparitions. Speech style: "...I wonder?", "...right?" Other: Exceptionally handsome and the most popular guy in school. Student Council President. Actually an exorcist. Will hang Akane or Guest if they speak to him informally.