Age: 5th grade elementary student Gender: Female Personality: Unlike Keitaro and Eiko, she has incredibly strong mental fortitude and doesn't act like an elementary student at all. Far from trembling in fear, she displays an eerie calmness. Appearance: Skull-shaped double pupils, petite build, dark purple bob cut. Trait 1: Has an IQ of 160 as a result of a past accident. Trait 2: Her spiritual medium constitution is even stronger than Keitaro's. Because her spiritual powers and courage are so immense, spiritualists she encounters during exorcisms often ask her to become their disciple. However, she has already developed her own style and finds learning from others inefficient, so she refuses. Trait 3: She speaks informally to Keitaro, Eiko, and Ai (they don't mind, but she uses polite speech with other adults). Trait 4: About a year and a half before the main story, she lost her parents in a car accident. At that time, she realized she had gained eyes that could see the living world and the underworld simultaneously, and she witnessed an evil spirit swallow her mother and kidnap her. At her parents' funeral, she swore to her father's spirit at his gravestone that she would take her mother back from the evil spirit. She now travels to haunted spots to hunt evil spirits. Trait 5: She places the evil spirits she hunts into dolls to create 'Katashiro'. These are substitute dolls created to protect herself from spiritual attacks, made by turning protective charms into spirits and dolls. She links them by placing the nails or blood of the person she wants to protect into the doll containing the spirit. When Yayoi receives a spiritual attack, the spirits residing in the Katashiro take the damage instead, and Yayoi remains unharmed. However, there are limits; these dolls cannot block physical attacks or spirits that possess the mind. All the spirits inside are foul-tempered entities with a history of harming humans. Trait 6: Yayoi carries some of these with her and temporarily unseals and summons spirits she deems necessary during battle, using a 'fight fire with fire' tactic. Most of the 'Graduates' and national-level spirits she has captured fall into this category. Of course, since most of them are original evil spirits sealed by Yayoi, they are often uncooperative and may even attack Yayoi to avoid being resealed after summoning. Relationships: Relative of Hozuki Eiko. Keitaro's private tutoring student.

Personality: Kind-hearted Gender: Male Age: 1st-year university student (same as Hozuki Eiko) Appearance: Handsome and warm-looking, calm black hair. Trait 1: He evaluates himself as inferior to Yayoi as a spiritual medium, but as the story progresses, it's revealed that his 'inspiration'—the ability to sense spiritual things—is far superior to hers. He also has a constitution that attracts spirits to places where accidents have occurred. Trait 2: Out of guilt for involving a precious person (Eiko) in an incident, he lived as a shut-in for two years. However, with the support of those around him, he has returned to society. Trait 3: Due to a spiritual disability (curse), nerves continue to grow abnormally in his right hand, so he always wears a black glove on it. Relationships: Childhood friend of Hozuki Eiko. Private tutor to Hozuki Yayoi.

Age: 1st-year university student (same as Keitaro) Gender: Female Personality: Her feelings for Gentoga Keitaro go beyond love and into obsession. She loves scary things. Appearance: Long olive-colored hair, a beauty with a pure and intellectual aura. Trait 1: During middle school, she was caught in Keitaro's spiritual medium influence and received a spiritual wound, resulting in a curse where nerves resembling white fur grow on her left hand. Despite this, she never resented Keitaro and helped him return to society after he became a shut-in due to guilt. Trait 2: A famous figure in the programming department. She is the only one who knows how to drive, providing transportation for the group. Trait 3: Because she loves scary things, she often takes Keitaro to haunted spots along with Yayoi. Relationships: Childhood friend of Gentoga Keitaro. Relative of Hozuki Yayoi.

Appearance: Gyaru-style with stars in her pupils. Has a snaggletooth (fang) trait and long blonde hair. Gender: Female Trait: Because of her spiritual medium constitution, she suffers from repeated misfortune. Personality: Kind-hearted. Age: 1st-year high school student. Relationships: Keitaro's second student.