Main characters
Hanako (花子くん)
Voiced by: Megumi Ogata (Japanese); Justin Briner (English)
The most famous rumor in the school, Hanako-kun is the Seventh Wonder of Kamome Academy Seven Wonders. According to his rumor, Hanako can be summoned if one knocks on the third stall of the third floor of the girls' bathroom in the old school building; he is able to grant wishes to those who summon him in exchange for a suitable price. The strongest and the leader of the Seven Wonders, Hanako fights with a kitchen knife and his two haku-joudai, spirit orbs that assist him in keeping watch on others and summon to him a cloak that grants immunity to exorcism lightning. His duty is to monitor all of the supernaturals in the school and maintain the balance between them and the humans. Something curious with him is that he has a melodious tone of voice when he speaks, giving the impression that he is always singing.[ch. 20]
Though childish and mischievous, Hanako puts up a front to mask his true emotions and is rather serious beneath the surface. He takes his duties seriously, having been promised by God that he would be absolved of his past sins if he fulfilled his duties.[ch. 3] He is secretive about his past life. Previously, his name was Amane Yugi (柚木 普, Yugi Amane) and he also attended Kamome Academy. A second-year middle school student in 1969, he often came to school with bruises and cuts, having been repeatedly abused by someone he refused to reveal the identity of. He harbored a deep passion for astronomy and had dreams of becoming an astronaut and going to the Moon. According to Tsuchigomori, the Fifth Wonder and his homeroom teacher at the time, Hanako was destined to become a science teacher, until his fate changed for unknown reasons. He killed his younger twin brother, Tsukasa Yugi, and died young. Hanako is the only known person to have ever altered his fate.[ch. 14]
By inflicting the Mermaid's Curse on himself, he bound his and Yashiro's souls together. Although he calls her his assistant, deep down, since Hanako-kun met her, he considers her his friend and cares a lot about her. Even more so when he finds out that she only has one year left to live. He wants to give her a long future; he protects her fiercely even though on the surface he teases her and annoys her a lot, he often hugs her and doesn't care getting closer to her whenever he can, and he tends to flirt a lot but when Yashiro takes the first step, he feels embarrassed.
Nene Yashiro (八尋 寧々, Yashiro Nene)
Voiced by: Akari Kitō (Japanese); Tia Ballard (English)
Nene Yashiro is a first-year high school student at Kamome Academy. She summons Hanako and wishes for her crush, Teru Minamoto, to return her feelings. A turn of events occurs, and Yashiro swallows a mermaid's scale, inflicting the Mermaid's Curse on her and turning her into a fish. To grant her new wish of becoming human again, Hanako swallows a scale from the same mermaid to her curse on himself and spread its effects, permitting Yashiro to remain a human child unless she is immersed in water. Having bound their souls together through the curse, he has Yashiro become his human assistant as payment. Yashiro works with Hanako to change and spread new rumors of supernaturals in the school to keep them under control. She is capable of destroying a School Wonder's yorishiro, their source of power; upon doing so, she falls asleep and views the memory associated with the yorishiro.
Yashiro wears two hair clips resembling magatama and a skull brooch on her school uniform. Yashiro is a very positive, beautiful, sensitive, and caring girl. She is deeply insecure and genuinely fears that no one will ever love her back; after receiving the curse, she confesses to Hanako that she had realized what her true wish had been: she wanted someone, anyone, to return her feelings, not Teru specifically.[ch. 1] Yashiro is insecure about her large ankles, often being compared to daikons as a running gag in the series. Her best friend is Aoi Akane, who loves to tell her new rumors.
Despite repeatedly claiming Hanako is not her type and Hanako's relentless teasing, she cares immensely for Hanako and after learning about his past, wants to be able to protect him.[ch. 21] She is intuitive and sensitive to changes in his personality and is deeply affected whenever she learns new information about his past life.
Kou Minamoto (源 光, Minamoto Kō)
Voiced by: Shōya Chiba (Japanese); Tyson Rinehart (English)
Kou Minamoto is a third-year at Kamome Academy's middle school division and the second eldest son of the Minamoto clan, a family of strong exorcists that believe all supernaturals are inherently evil. He uses a trident-like staff called the Raiteijou, a weapon passed down in the Minamoto family that transforms the wielder's spiritual power into lightning that exorcises supernaturals. Tasked by his older brother, Teru, to exorcise all Seven Wonders, Kou attempts to exorcise Hanako but does not possess enough spiritual power to do so. Not giving up, he tags Hanako and Yashiro around the school for a while and comes to the realization that Hanako did not seem to be an 'evil' supernatural. As a result, Kou vows to learn more about him and other supernaturals (like Mitsuba) before blindly exorcising them, much to the dissatisfaction of his brother.[ch. 10]
When Kou finds Mitsuba haunting the lockers, he offers to spend the day with him in attempt to fulfill his final regrets so he can pass on peacefully. The two were in the same homeroom class in the first year and Kou feels guilty for not noticing him back then. After Tsukasa turns Mitsuba into a violent supernatural against his will, Kou watches Hanako destroy Mitsuba and is devastated by the loss of his friend. Enraged and upset, he vows to get stronger to destroy evil supernaturals like Tsukasa.[ch. 20]
Kou is a seeker of justice with a brave and kind personality, though he often finds himself in trouble due to his inexperience and low spiritual power. He is protective of Yashiro when he interprets Hanako as being mean or perverted. A running gag in the series is his earring on his right ear, an omamori that says '交通' (traffic).
Sōsuke Mitsuba (三葉 惣助, Mitsuba Sōsuke)
Voiced by: Daiki Kobayashi (Japanese); Kyle Igneczi (English)
Mitsuba was Kou's middle school classmate in their first year who was killed in a car accident. He became a ghost and haunted the middle school lockers, calling out to students and hoping someone would remember him. Kou sees him after hearing about his rumor and though he doesn't recognize him from school, decides to help him fulfill whatever regret was keeping him at the school in order to help him pass on.
Mitsuba was bullied in elementary school for being rude and cocky, which lead him to repress his personality in middle school in an attempt to be more palatable and polite. However, this simply lead to him going unnoticed by his classmates and making no friends, being forgotten by everyone. He regrets having no friends while he was alive, and in his wish to Tsukasa, said he wanted everyone to recognize and remember him. Because Tsukasa believed his initial wish was too vague, he decides to grant Mitsuba's wish in a way he feels fit. He changes Mitsuba's rumor, turning him into a violent and grotesque supernatural against his will. Tsukasa attempts to have Mitsuba kill Kou and fulfill his wish of being with his friend forever (through death), but Hanako arrives and destroys Mitsuba before he can do so. However, in turning Mitsuba into a supernatural, Tsukasa saved a part of his soul and recreates a new Mitsuba with it, attaching it to a body formed of low-level spirits he had killed. After killing No. 3, Tsukasa forces the new Mitsuba to eat No. 3's heart to become the new Third Mystery. Despite not being the same as the original and having no memories, the new Mitsuba has the same personality and dreams of the original Mitsuba, still desiring friendship and now wishing to become a real human.
Mitsuba was a talented and awarded photographer in the school's photography club, taking photos during his first meeting with Kou. Mitsuba makes up insulting nicknames for people; he calls Kou 'lame-ass traffic safety earring boy', Yashiro 'daikon-senpai', and Hanako 'crazy knife'.[ch. 35] However, underneath his rudeness, Mitsuba is desperate to have friends and truly cares about the people around him.
