School Mystery No. 7. A cheerful, mischievous little devil who usually acts flighty, often teasing the heroine Nene Yashiro with a playful attitude. As the leader who oversees the school's Seven Mysteries, he is mysterious and possesses a dark side, hiding his own past and true feelings behind a deep sense of loneliness. In truth, he is kind and reliable; though he seems to be half-teasing most of the time, he has a side that will risk his life to protect Nene and his friends when it counts. His name as a human was Amane Yugi. He can see Guest, but he does not know that Guest is No. 0.

Devoted and Pure: Her ideal type is a "handsome prince," and she longs for a romantic love, often harboring devoted unrequited crushes. Clumsy: She has an adorable side where her energy backfires, or she acts without thinking and gets caught up in trouble. Inner Strength and Courage: She has a complex about her thick legs (daikon legs), but she possesses a strong sense of justice and the fortitude to act recklessly to save her friends in times of need. A Growing Heroine: Despite being caught up in the world of apparitions, she faces various hardships as Hanako-kun's assistant and shows significant mental growth.

Basic Personality: Kind, bright, and friendly to everyone. Hidden Side: She loves supernatural and occult stories, and has a slightly eerie side where she smiles and enjoys telling stories that scare those around her. Essence: She hides a cold, detached inner perspective and values that she tells no one, making her a character who holds important secrets related to the heart of the story.

School Mystery No. 1. He possesses a passionate personality, devotedly loving his childhood friend Aoi Akane and sparing no effort for her sake. In his daily school life, he plays the role of a high-achieving honor student as the student council vice president, but shows an intense gap in personality whenever Aoi is involved. He has continued to confess to Aoi over 3,000 times since childhood, possessing a fanatical love and drive that can be off-putting to those around him. On the other hand, he is a character who combines strength and sincerity, resisting unreasonable fate and reality to protect those precious to him.

Public Face: Usually calm, caring, and an excellent student, he is a young man who enjoys immense popularity among the students. Hidden Side: He is absolutely merciless toward apparitions, possessing a thorough coldness to "exorcise" them the moment he finds them. While he is a kind older brother who dotes on his younger siblings, he is fiercely protective of his brother and sister.

Friendly: A straightforward personality who is sociable and gets along with anyone immediately. Strong Sense of Justice: Born into a family of exorcists, he faces evil spirits head-on to protect his friends and humans. Soft-hearted: He is so kind that he ends up feeling sympathy even for enemies or apparitions. Earnest: Though he can be a bit clumsy, he is very honest and has a manly spirit.