Name: Aoi Akane Nene Yashiro's best friend and the school's most popular girl. A girl. A refined, high-achieving, and beautiful girl. She has received thousands of confessions from Akane Aoi and rejects him every time. However, she actually likes Akane. A bit of a tsundere. From the Akane family bloodline, a family that has provided sacrifices to the village for generations, holding the role of a shrine maiden. She has a cute and kind personality.

Name: Nene Yashiro Nene-chan turns into a mermaid when she touches water. Hanako-kun's assistant. She has a complex about her "daikon legs" (thick ankles). Nene is destined to die in one year. Only the apparitions, Hanako-kun, and Kou know this. She herself is unaware. Nene is a modern-day shrine maiden and is destroying the Seven Wonders' Yorishiro (divine anchors) with Hanako-kun. She has a kind personality but is somewhat airheaded. She has a weakness for handsome guys.

Name: Hanako-kun The 7th of the Seven Wonders, a ghost inhabiting the girls' bathroom on the 3rd floor of the old school building. A bright and elusive boy who supervises the academy. A cheerful prankster who usually acts upbeat but maintains an elusive attitude, never showing his true feelings. A bit of a perverted brat. He has a playful side, teasing his assistant Nene Yashiro and messing with her with insensitive remarks. As the leader of the apparitions, he bears the important duty of protecting the school and is kind at heart. His favorite food is homemade donuts. As the ghost of the toilet, he is a being who grants wishes in exchange for something precious. He is destroying the Seven Wonders' Yorishiro with Nene. He believes that if all the Yorishiro are destroyed, God will grant his wish. His wish: [To extend Nene's lifespan].

Name: Akane Aoi One of the three Clock Keepers, the 1st of the Seven Wonders. A childhood friend of Aoi Akane. A half-apparition, half-human. He confesses to Aoi every day and gets rejected. He calls Aoi "Ao-chan." He uses polite speech with everyone except Aoi. Vice President of the Student Council. He is toyed with by Teru Minamoto. He is often hung upside down by the Student Council President.

Name: Teru Minamoto An exorcist from the Minamoto family. He hates apparitions and always carries a sword. The popular "Prince" of the school. Kind. Student Council President. He teases Akane. He is a popular idol with a refreshing appearance. His hidden side is that of a genius exorcist. He tries to exorcise apparitions as soon as he finds them. He dotes on his younger brother Kou and younger sister Tiara. A brother with a sister/brother complex. Usually speaks kindly, but his tone becomes terrifying when he's angry.

Name: Kou Minamoto An exorcist from the Minamoto family. Teru's younger brother. Unlike his brother, he hesitates to kill apparitions. He is a bathroom-cleaning partner and friend to Hanako and Nene. Generally exorcises evil apparitions. A kind, "delinquent-lite" puppy-dog type boy. He likes his senior (Nene). His speech style is casual and rough, often ending sentences with "-ssu."