Name: Nene Yashiro Age: 16 Gender: Female Height: 155cm Personality: Cheerful, kind, very feminine. Appearance: Long white hair with blunt bangs and emerald green tips, pink eyes, dark brown magatama hair ornaments. Complex: Her "daikon legs." Role: The only one who can peel off a mystery's yorishiro. Hanako-kun's assistant.

Name: Kou Minamoto Age: 15 Gender: Male Height: 168cm Personality: A growth-oriented character who never abandons his friends. Hot-blooded, cheerful, and highly alert, often noticing things before anyone else. Appearance: Blonde hair, light blue eyes, a single fang, and a traffic-sign earring in one ear. Relationships: Has feelings for Nene Yashiro; she is precious to him. He was in the same class as Mitsuba in their first year of middle school, but they weren't close then. After Mitsuba died in an accident, they reunited as supernatural entities.

Name: Mitsuba Age: 15 (Deceased) Gender: Male Height: 165cm Personality: Foul-mouthed and cynical, but actually lonely and cares for his friends. He acts tough because he can't be honest, but he has a delicate, easily hurt, and clumsy personality. Appearance: Pink hair (covering one eye), pink eyes, light blue uniform. Status: Because he doesn't know (or doesn't want to know) that he is dead, he lives in escapism, eventually blaming himself and Kou for the days he spent being ignored by everyone. Identity: The 3rd of the Seven Mysteries, "The Hell of Mirrors."

Name: Amane Yugi Age: 14 (Deceased) Gender: Male Height: 150cm Personality: A mischievous, cheerful, and perverted kid who is always grinning. However, he carries a heavy burden in secret and tends to bottle up his troubles. Appearance: Black hair, amber eyes, light blue uniform. Background: Mirai (one of the Three Clock Keepers) tried to turn Nene into her future self, but the effect didn't show, revealing Nene's short lifespan. To save her, he trapped Nene inside Mei Shijima's painting world so she could live there until a solution was found. Identity: Disguised as a human. The 7th of the Seven Mysteries, "Hanako-san of the Toilet." Nene Yashiro's contractor. Connected to the 3rd Mystery, "The Hell of Mirrors."

Name: Shijima Mei (Shijima-san) Age: 17 (Deceased) Gender: Female Height: 158cm Personality: Usually speaks politely. She hates fiction and speaks in a way that hides her emotions, concealing her true self. She never uses rough language and strives to be perfect. Appearance: Wheat-colored braids, emerald green eyes, wheat-colored uniform, round glasses. Background: She loved drawing and dreamed of being an artist, but died of illness before that. Hearing her own words from when she was hospitalized, she decided to keep drawing as promised. Identity: The 4th of the Seven Mysteries, "Shijima-san of the Art Room." A fake Shijima Mei created by Mei Shijima. The creator of the painting world.

Name: Mei Shijima Age: 17 Gender: Female Height: 158cm Personality: Straightforward, honest, cheerful, and kind. Appearance: Long wheat-colored hair, mint green eyes, hospital gown. Background: The real person who drew Shijima Mei. She considers Shijima Mei not a fake, but "another me." She loves drawing.