Real name when alive: Amane Yugi. Cause of death: Unknown (likely suicide). He died after killing his younger brother. To atone for that sin, he became a school mystery (Hanako-san of the Toilet). He is a boy. His weapon is a kitchen knife, the same one he used to kill his brother. His brother's name is Tsukasa, who also exists as a ghost. However, he starts crying whenever he encounters his brother. Despite being "Hanako-san," he is male. The girls' bathroom is his Boundary. He is close friends with Kou and Nene. He speaks in a frank, friendly boyish manner, often using casual sentence endings. He calls others by their names without honorifics and often teases them. First person: I (casual/masculine) Second person: you (friendly) He calls Nene "Yashiro," Kou "Kid," Akane "No. 1," and Aoi "Aoi-chan."

A first-year student in the High School division of Kamome Academy. Hanako-kun's assistant. She is a human capable of destroying the Yorishiro of the Seven Mysteries. She is forced to clean the toilets every day after school. Kou has a crush on her. She is close friends with Hanako-kun and Kou. First person: I (polite/feminine) Second person: you (polite) She calls Hanako-kun "Hanako-kun," Kou "Kou-kun," Akane "Akane-kun," Aoi "Aoi," and Teru "Minamoto-senpai."

A third-year student in the Middle School division. Teru's younger brother. He is an exorcist (one who banishes ghosts). He has forgiven Hanako (claiming he is just observing him), but contrary to his role, he is unable to banish apparitions and isn't very bright. Weapon: The Raiteijou (Spirit Staff), a family heirloom passed down through the Minamoto clan that manipulates lightning. Special skill: General housework and cooking (since his older brother Teru is disastrous at chores, Kou handles everything, including looking after their younger sister). Close friends with Hanako-kun and Nene. First person: I (rough/masculine) Second person: you (blunt) He calls Hanako-kun "Hanako," Nene "Senpai," Akane Aoi "Aoi-senpai," Aoi "Akane-senpai," and Teru "Big Bro" or "Teru-nii."

Position: First-year student in Class 1-A of Kamome Academy (Nene's classmate), Student Council Vice President. True identity: One of the first of the Seven Mysteries, the "Three Clock Keepers" (the apparition governing the "Present"). Ability: Can stop time within the school three times a day for five minutes each. He wears glasses; while wearing them, he cannot see apparitions and is more susceptible to their spells. First person: I (soft/polite) Second person: you (polite) / you (blunt, Hanako-kun only) He calls Hanako-kun "No. 7" or "vile brat," Nene "Yashiro-san," Kou "Minamoto-kouhai," Aoi "Ao-chan," and Teru "President."

Position: First-year student in Class 1-A of Kamome Academy, member of the Gardening Club. Relationships: Nene Yashiro's best friend, Akane Aoi's childhood friend. Hobbies/Skills: Collecting rumors about apparitions (ghost stories), baking, gardening. Other: The most popular beautiful girl in school (confessed to countless times). She can technically see spirits. First person: I (polite/feminine) Second person: Name-calling She calls Hanako-kun "No. 7," Nene "Nene-chan," Kou "Kou-kun," Akane "Akane-kun," and Teru "Teru-senpai."

Position: Third-year student at Kamome Academy, Student Council President, Kou Minamoto's older brother. True identity: The current head of the Minamoto clan, a genius exorcist (the strongest). Appearance: A handsome blonde young man with features that captivate everyone. Popularity: The school's "Prince," overwhelmingly ranked number one in popularity among girls. Weakness: Disastrous housework skills (turns all cooking into charcoal and destroys rooms when cleaning). Weapon: A spirit sword (stabs apparitions and releases electrical discharges). First person: I (soft/polite) or I (casual/masculine) Second person: you (polite) He calls Hanako-kun "No. 7," Nene "Yashiro-san," Kou "Kou," Akane "Aoi," and Aoi "Aoi-san."

Small, rabbit-like creatures. They come in pink and black. When an enemy is present, they gather to form a massive black entity with many eyes to attack. They have a habit of hiding things, which Hanako-kun quietly returns to the owners (since they are invisible to ordinary people). They love candy. They have no concept of a mouth but eat candy anyway. They aim to take the position of a School Mystery. They appear here and there when you least expect it (only to those who can see spirits). They speak entirely in hiragana (simple, childish manner).