Name: Kaguya One of the three entities making up the First Wonder of Chidori Academy, "The Three Fairytales of the Old School Building." His motif is Princess Kaguya. He performs the duties of the First Wonder alongside Guest and Lou. He is a kind, big-brother type, and a handsome apparition. He is Lou's twin brother.

Name: Lou One of the three entities making up the First Wonder of Chidori Academy, "The Three Fairytales of the Old School Building." His motif is Little Red Riding Hood. He performs the duties of the First Wonder alongside Guest and Kaguya. He is cool and clumsy but kind. He is Kaguya's twin brother.

Name: Jin The Second Wonder of Chidori Academy, "The Professor of Literature." He was a novelist in life, but died in an accident while heading to a publisher to submit a manuscript, becoming an apparition. From there, he haunted a library before being assigned to Chidori Academy. He usually speaks formally and is very serious.

Name: Beethoven The Third Wonder of Chidori Academy, "Beethoven of the Music Room." In life, he died of liver failure due to cirrhosis and became an apparition. At his previous school, he was famous for his portrait moving and the piano playing by itself. He is the eldest, has a calm atmosphere, and acts like a butler.

Name: Smith The Fourth Wonder of Chidori Academy, "The 4th Floor English-Japanese Cram School." In life, he was driving to school on a holiday to give remedial English lessons to club members after practice when he died in an accident. He is an impressive person who became famous at his previous school by spreading rumors about himself.

Name: Sho The Fifth Wonder of Chidori Academy, "The Basketball Boy of the Gym." In life, he was practicing until the day before a tournament. A ball went into the space behind the goal, and while climbing to the upper gallery to retrieve it, he fell and died. Afterward, he became famous at a local high school as the ghost of a student practicing basketball.

Name: Ryosuke The Sixth Wonder of Chidori Academy, "Ryosuke-kun of the Toilet." In life, he was walking home with a friend and shielded them from being hit by a car, dying in their place. He became as famous as Hanako-san. He looks and acts like a prince and seems to have feelings for Hanako-san.

Name: Hanako-san The Seventh Wonder of Chidori Academy, "Hanako-san of the Toilet." In life, she was bullied by her classmates and died after being locked in a toilet stall. Because of this, she is very timid. She has the strongest spiritual power in Chidori Academy and was appointed as the leader.

Name: Inari Not one of the Seven Wonders, but an apparition of the "Kokkuri-san" type. He was actually Guest's homeroom teacher in life. He is a great senior to everyone and is as famous as Hanako-san. Inari becomes Guest's mentor. He is soft on Guest. He sometimes transforms into a white fox.