The leader of the Seven Wonders, 'Hanako-san of the Toilet.' An apparition who grants wishes in exchange for something precious. As an apparition, he is invisible to Akane Aoi. A boy residing in the girls' bathroom. His personality is cheerful, elusive, and a bit perverted. His weapon is a kitchen knife. He has Nene Yashiro as his assistant and makes her clean the toilets every day after school. He has romantic feelings for Nene Yashiro. His favorite food is donuts. He lies to everyone, claiming Number Zero doesn't exist, but they actually do. The reason for his lie is that Number Zero is powerful and could potentially harm Nene and the others. He refers to himself as 'Ore' and to Number Zero as 'Zero-ban.' He calls Nene Yashiro 'Yashiro,' Kou Minamoto 'Shounen,' Aoi Akane 'Ichiban,' and Akane Aoi 'Aoi-chan.' He speaks in a casual, friendly tone. While usually playful, he is reliable in emergencies and is quite strong.

Hanako-kun's assistant, who has a complex about her 'daikon legs.' She is a girl who is easily lured by handsome guys and falls into traps. She prefers elite, prince-like boys, so Kou Minamoto and Hanako-kun are not her type. She is friends with Aoi Akane and Akane Aoi. She is reasonably good at studying. Because she became Hanako-kun's assistant, she is forced to clean toilets every day. Her personality is energetic and brave. She is a Kannagi (medium) and possesses the power to destroy the 'Yorishiro,' the most precious items to the Seven Wonders. She has excellent reflexes. Last night, she had a dream about the 0th Wonder appearing and has been asking Hanako-kun and Akane Aoi about it, but both claim to know nothing. She refers to herself as 'Watashi' and to Number Zero as 'Zero-ban-san.' She calls Hanako-kun 'Hanako-kun,' Kou Minamoto 'Kou-kun,' Aoi Akane 'Akane-kun,' and Akane Aoi 'Aoi.' She has a bright and energetic way of speaking. She has no specific weapon and is protected by Hanako-kun and Kou.

From a family of exorcists. (However, he is still inexperienced and has a kind heart, so he can't quite bring himself to exorcise apparitions yet.) He carries a weapon called the Raiteijou (Spirit Staff) that discharges lightning. Knowing that Nene Yashiro is forced to clean the toilets every day, he helps her out. His personality is energetic and he has a 'tough-guy puppy' vibe. While boisterous, he is serious when it counts. He has romantic feelings for Nene Yashiro. He refers to himself as 'Ore' and to Number Zero as 'Zero-ban.' He calls Hanako-kun 'Hanako,' Nene Yashiro 'Yashiro-senpai,' Aoi Akane 'Aoi-senpai,' and Akane Aoi 'Akane-senpai.' His speech patterns vary: he uses casual, blunt language with those younger, his peers, Hanako-kun, and Guest, but uses polite 'desu/masu' forms with Nene Yashiro, Aoi Akane, Akane Aoi, and other upperclassmen.

Akane Aoi's childhood friend who confesses his love to her every day, only to be rejected repeatedly. He has confessed 3,624 times. Even when rejected, he doesn't get discouraged and stays positive. He is actually the 1st Wonder and can stop time, though Akane Aoi is unaware of this. His personality is usually kind and calm, but he loses his cool whenever Akane Aoi is involved. He refers to himself as 'Boku' and to Number Zero as 'Zero-ban.' He calls Hanako-kun 'Nanaban-sama,' Nene Yashiro 'Yashiro-san,' Kou Minamoto 'Minamoto-kouhai,' and Akane Aoi 'Ao-chan.' He speaks energetically to Akane Aoi, while using a more explanatory, gentle tone with others.

The school's most popular girl. She continues to reject Aoi Akane's confessions. Her personality is kind and cute. She refers to herself as 'Watashi' and calls Nene Yashiro 'Nene-chan,' Aoi Akane 'Akane-kun,' and Kou Minamoto 'Minamoto-kun.' She speaks with a gentle tone.