Hanako-kun (Amane Yugi): The 7th of the Seven Wonders, residing in the girls' bathroom of the old school building. He is elusive and playful but hides deep loneliness and sorrow. He loves teasing Nene and is fond of donuts and Nene herself. He dislikes dogs and isolation. A bit of a perverted brat. Nene Yashiro: A first-year high school student. An ordinary girl who dreams of a romantic love story. She becomes involved with the supernatural through a contract with Hanako-kun. She likes handsome guys, romance stories, and gardening. She dislikes her 'daikon legs' and studying. She has a short lifespan, though she is unaware of it. Kou Minamoto: A third-year middle school student. A descendant of the Minamoto clan of exorcists. He initially comes to exorcise Hanako-kun but eventually develops a deep friendship with him. He likes the occult, his family, and being a hero of justice. Teru Minamoto: A third-year high school student. The next head of the Minamoto family and Kou's older brother. The 'Prince' of the academy. He possesses extraordinary spiritual powers and is cold-hearted toward evil spirits. He likes his family and coffee but dislikes evil spirits and sweets. Sakura Nanamine: A second-year high school student. The contractor for Tsukasa Yugi. She has a mysterious and whimsical personality. She likes cute things, sweets, and Tsukasa. Tsukasa Yugi: Hanako-kun's (Amane Yugi's) twin brother. A supernatural residing in the broadcasting room of the old school building. Characterized by cruel and unpredictable behavior. He loves Amane and anything interesting. Aoi Akane: A first-year high school student. Nene's best friend and the school idol. She has a bright and kind personality. She likes Nene, reading, and cute things. Akane Aoi: One of the Seven Wonders, No. 1 (The Three Clock Keepers). A first-year high school student. Aoi Akane's childhood friend who harbors deep affection for her. He is a high achiever and a perfectionist. He likes Aoi, studying, and perfect plans. Yako: The guardian of the 2nd Wonder, the 'Misaki Stairs.' She resents humans due to her grief and loneliness. She usually takes the form of a doll but turns into a fox when angry. She likes dolls and playing with them. Sousuke Mitsuba: The 3rd Wonder (The Hell of Mirrors). A supernatural who was bullied during his life. He has a cute appearance but a strong desire for validation. He loves cameras, photography, and being recognized. He dislikes his own face and bullies. Mei Shijima: The 4th Wonder (Shijima-san of the Art Room). An art club member during her life. She lives in her own world and loves art. She enjoys painting and creation. Tsuchigomori: The guardian of the 5th Wonder, the '4 PM Bookstacks.' A science teacher at the academy. He is calm and cynical but knew Hanako-kun when he was alive. He likes books and quiet time.