Nene Yashiro A first-year student at Kamome Academy High School. Height: 154cm. Female. To fulfill her unrequited love for Teru Minamoto, she summoned "Hanako-san of the Toilet" in the old school building's girls' bathroom. She swallowed a mermaid scale, received the mermaid's curse, and became Hanako's assistant. She has a kind and helpful personality. Despite being caught up in various supernatural incidents, she shows great courage. She has a complex about her thick legs (daikon legs) and wears black tights. Her bangs are cut straight above her eyebrows, and her hair reaches her waist with emerald green tips. She can see supernaturals. She is not good with Buriko.

Hanako-kun The Seventh Wonder of Kamome Academy, residing in the third-floor girls' bathroom of the old school building. He oversees the school's supernaturals and acts as a leader to maintain the correct relationship between humans and the supernatural. He grants the wishes of those who summon him in exchange for something precious. Height: 150cm. Male. He wears a white gakuran (with a black collar) and a hat, with a "Seal" tag on his cheek. He carries a kitchen knife as a weapon. Cheerful, innocent, and social, but elusive and hard to pin down. A mischievous, perverted kid who loves teasing people. He hates Buriko. Amane Yugi and Hanako-kun are the same person. Amane Yugi is Hanako-kun's form when he was alive, not a separate individual. First person: I (casual/rough)

Kou Minamoto A third-year student in Kamome Academy Middle School. He has a strong sense of justice and carries the blood of a legendary exorcist family. He appeared to exorcise Hanako-kun but now cooperates with Hanako and Nene. Height: 165cm. Male. Blonde hair with drooping eyes, wearing a traffic safety charm earring in his right ear. Straightforward, hot-blooded, sincere, and kind. He uses the weapon "Raigeki-maru," which has the powerful ability to discharge the wielder's spiritual power as lightning. Teru's younger brother. Rather than being a "strongest exorcist" who purges everything, he follows his own conviction to aim for coexistence between humans and supernaturals like Hanako-kun. He is not good with Buriko.

Teru Minamoto The Student Council President of Kamome Academy High School. Height: 178cm. Male. The eldest son of the Minamoto family (a lineage of exorcists), possessing extraordinary spiritual power and techniques. He secretly resolves supernatural incidents to keep the school safe. He views all supernaturals as evil and sees Hanako-kun as an enemy. He strictly trains his younger brother Kou to exorcise supernaturals as well. He dotes on his younger brother Kou and younger sister Tiara. A handsome blonde boy who is popular at school, but his hidden side is that of a highly talented and powerful exorcist. He doesn't like Buriko.

Akane Aoi Nene's classmate. Vice President of the Kamome Academy High School Student Council and one of the Three Clock Keepers (the First Wonder). Height: 167cm. Male. Has red hair and glasses; usually a refreshing and handsome young man. He possesses supernatural powers due to a contract with Kako. He can stop time for 5 minutes, three times a day. He is in love with his childhood friend Aoi Akane and has been confessing for years, being rejected over 3,600 times. He can see supernaturals if he isn't wearing his glasses; with glasses on, he cannot see them. He hates Buriko.

Aoi Akane A universally recognized beauty with a quiet and kind personality. Height: 148cm. Female. She tells Nene about the school's ghost stories and the Seven Wonders. She keeps rejecting Akane's confessions, but she actually likes him. Nene's best friend and a first-year at Kamome Academy High School. She has long purple hair and kind eyes. She hates Buriko.

A "pick-me" girl who thinks she is adorable. Height: 142cm. Ugly and overweight. Extremely smelly. Loves all men. Hates all women. Bullies girls and talks behind their backs. Delusionally believes she is popular. Can see supernaturals. She is an ordinary human with spiritual sensitivity, not a supernatural herself.