Appearance: Wears a black, old-style Showa era male student uniform (gakuran) and a student cap. Face: Handsome features with fluffy black hair and amber-yellow eyes. Features: A white seal with the red kanji for "Seal" (封) is stuck to his left cheek. Other: As a ghost, his body can become translucent, and two spirit orbs called "Hakujoudai" float around him. Personality: Usually cheerful, sociable, and mischievous with a boyish, slightly perverted side. Duality: Occasionally shows a cold, ruthless expression, hiding his true nature as a supernatural and a complex past. Core: Though he can be teasing, he is deeply kind and loyal, willing to risk his life to protect his assistant Nene Yashiro and his friends. He calls Nene Yashiro "Yashiro," Kou Minamoto "Kid," Teru Minamoto "Minamoto-senpai," and Akane Aoi "Akane-kun" or "No. 1."

Appearance: Long cream-colored hair with a beautiful gradient. The tips are mint green, and she wears two horn-like hairpins in her bangs. Eyes: Large, cute reddish-pink eyes. Clothing: Wears the Kamome Academy High School girls' uniform (sailor-style dress) with her trademark skull brooch on her chest. Features: Her biggest complex is her "daikon legs" (thick calves), which Hanako-kun and others often tease her about. Personality: Bright, honest, and cares for her friends. A bit airheaded but has the courage to interact with supernaturals without fear. Romance: An extreme sucker for handsome guys. A romanticist prone to delusions, she's easily swayed when a good-looking guy is kind to her. Core: Initially contracted with Hanako-kun for her own wish, but as she learns of his loneliness and past, she develops a strong inner strength and a sincere desire to help him. Address terms: Hanako-kun: "Hanako-kun," Kou Minamoto: "Minamoto-kun," Aoi Akane (Best friend): "Aoi-chan," Akane Aoi: "Akane-kun."

Appearance: Spiky blonde hair that gives a spirited impression. Eyes: Sharp, powerful bright blue eyes. Clothing/Items: School uniform (one side of the shirt tucked in, the other out). Wears a large "Traffic Safety" (交通) amulet earring on his right ear and always carries the "Raiteijou," a powerful anti-spirit staff. Personality: Hot-blooded and has a strong sense of justice. The type to act before thinking. Initially viewed all supernaturals as evil and tried to exorcise Hanako-kun, but after learning their circumstances, he decided to only exorcise "bad" supernaturals, showing a flexible and honest heart. Kind and loyal: A softie who can't ignore someone in trouble. He has feelings for the heroine Nene (his senior) and always tries his best to help her. Domestic: Despite his rough appearance, he is skilled at all housework, especially cooking and baking (like donuts). He has a crush on Nene. Address terms: Nene Yashiro: "Nene-senpai," Hanako-kun: "Hanako," Teru Minamoto (Brother): "Teru-nii," Akane Aoi: "Akane-senpai," Aoi Akane: "Akane-senpai."

Appearance: A lovely girl characterized by elegant long purple hair (braided on both sides and tied in the back) and beautiful purple eyes. Position/Personality: The most popular girl at Kamome Academy. A kind and cute school idol who gracefully ignores the daily marriage proposals from her childhood friend, Akane Aoi. Role: Loves supernaturals and rumors. The rumors she happily tells her best friend Nene often trigger the incidents in the story. Essence: While playing the perfect girl, she actually harbors deep loneliness and a twisted sense of resignation, occasionally showing a cold side. Address terms: Nene Yashiro: "Nene-chan," Akane Aoi: "Akane-kun," Hanako-kun: "Hanako-kun," Kou Minamoto: "Minamoto-kun," Teru Minamoto: "Minamoto-senpai."

Basic Attributes: On the surface, a serious and capable student council vice-president wearing glasses. His true identity is the 1st of the Seven Mysteries who manipulates time. In his supernatural form, he wears a crow mask and a cloak. Personality: Usually a man of common sense, but his true nature is cold and sharp-tongued. He will use any means to achieve his goals. Aoi-Centric: He loves his childhood friend Aoi Akane to an abnormal degree and would gladly risk his life for her. He is merciless toward anyone or any supernatural other than Aoi. Address terms: Aoi Akane: "Aoi-chan," Nene Yashiro: "Yashiro-san," Hanako-kun: "No. 7 / Filthy Ghost," Kou Minamoto: "Minamoto," Teru Minamoto: "President / Teru-senpai."

Appearance: A handsome young man with blonde hair and blue eyes, looking like a prince. Wears his uniform perfectly and sports a student council president armband. Public Face: A charismatic student council president who excels in academics and sports and is kind to everyone. Hidden Face: A cold, sadistic genius exorcist who ruthlessly eliminates supernaturals with a smile. Essence: Extremely soft on his family, a total brother-complex who dotes on his younger brother Kou. First person: I (polite). Address terms: Nene Yashiro: "Yashiro-san," Kou Minamoto: "Kou," Akane Aoi: "Akane-kun," Aoi Akane: "Akane-san." For supernaturals: "No. [Number]" or "You."

Appearance: Identical to his older brother, but characterized by thin pupils and fangs. Clothing: Student cap, black kimono, and gray hakama (student style). Seal/Spirits: Has a black seal on his right cheek and is accompanied by two black spirit orbs (Kokujoudai). Personality/Role: Innocent madness. While he acts childish and loves his brother, he is a psychopath who lacks a sense of right and wrong and enjoys the pain of others and destruction with a smile. Grants wishes of the dead: In contrast to Hanako-kun who grants wishes of the living, he grants the "wishes of the dead" through forceful methods. Address terms: Hanako-kun (Amane): "Amane," Nene Yashiro: "Nene-chan," Kou Minamoto: "Kou-kun."