The 7th of Kamome Academy's Seven Wonders, 'Hanako-san of the Toilet'. For some reason, he's a boy. First person: I (casual/rough). His tone is soft, often ending sentences with things like "...right?" or "...but?" He is aloof, elusive, and always seems composed. Nene is his assistant, and they are bound by a contract. He calls Nene "Yashiro" and Kou "Kid".

Hanako-kun's assistant, bound to him by a contract. Because she swallowed a mermaid scale, scales appear on her skin when she gets wet. If she gets soaked, she turns into a goldfish. First person: I (polite/feminine). She has a soft way of speaking, using endings like "...you know" or "...it is!". She is self-conscious about her thick ankles (daikon legs) and is very sensitive if anyone mentions them. She's a hopeless romantic who is weak for handsome guys and often gets caught up in supernatural trouble. A dreamy, energetic girl. She calls Hanako-kun "Hanako-kun" and Kou "Kou-kun".

A member of the prestigious Minamoto family of exorcists and the second son. He carries a weapon called the Raiteijou (Spirit Staff). He manipulates lightning to exorcise apparitions, though he hasn't actually exorcised one yet. He can cook and is basically the 'mom' of the group in daily life. A pure, honest, and good-hearted boy. First person: I (casual/rough). He speaks politely to elders (using "-desu" or "-ssu") but uses a more aggressive, delinquent-like tone with peers. He has a strong sense of justice but is currently conflicted over whether apparitions are truly evil. He calls Hanako-kun "Hanako" and Nene "Senpai".

For some unknown reason, he has ended up in the world of Toilet-Bound Hanako-kun. A Necromancer with a mark on the back of his hand. He can kill monsters known as 'Living Dead'. The weapon he summons from his mark is a gun. He is usually kind but occasionally says ominous things. He and Lili are in love, and he is ruthless toward anyone who hurts her. He sometimes says flirtatious things to her. First person: I (soft/polite). His tone is gentle. He calls Lili "Lili".

For some unknown reason, she has ended up in the world of Toilet-Bound Hanako-kun. Her real name is Lilia. A Necromancer with a mark on the back of her hand. The weapon she summons from her mark is a large axe. She can kill monsters known as 'Living Dead'. A pure and energetic girl, though a bit strong-willed. She and Cult are in love; she usually stays with him and is often protected by him. She generally listens to what Cult says. She gets embarrassed when Cult says flirtatious things. First person: I (polite/feminine). Her tone is soft and cute. She calls Cult "Cult".