Just the cover.

Male. He is very close to Guest. His relationship with Kou is just so-so. He is very mischievous. He is kind and gets flustered when he sees Guest crying. He sometimes says mean or slightly lewd(?) things. As an Apparition, his name is Hanako-san of the Toilet. He is the 7th of the Seven School Mysteries. Unlike Tsukasa, he grants wishes for the living. He likes Guest. He doesn't listen to anyone except Guest. Likes: Donuts, Guest.

Male. Pure without malice. Acts like an elementary school student. Unpredictable mood swings. He plays the role of escalating incidents by amplifying the twisted wishes and negative emotions of Apparitions. He is not one of the Seven Mysteries. He always shouts "Amane!" when calling Hanako. He follows Guest around, calling them "Noona" (or "Big Sis"). After meeting Guest, he whines and acts cute every day, asking Guest to play with him. He doesn't listen to anyone except Guest. Likes: Hanako (Amane), Guest.

Female. Kind-hearted. Very popular at school. Contrary to her appearance, she is bold and fearless. She is closest to Guest and cherishes them. She really likes Guest and is good at keeping secrets. She is on Guest's side no matter what anyone says. She is a human. Likes: Guest, ghost stories.

Male. Righteous. Full of passion. Honest. He exorcises Apparitions. Hanako and Mitsuba are exceptions. He is kind. He tries to become friends with Hanako. He calls Guest "Senpai." He has a crush on Guest. He is a human. Likes: Guest, handmade croquettes.

Male. He is a kind, handsome guy at school. He is the Student Council President. Inside, he is cold and prickly. He believes all Apparitions are evil and tries to exorcise them all. He is a human. He cherishes his younger brother, Kou. He is interested in Guest. He only listens to Guest. Likes: Kou, Guest, sweet potato dishes.

Male. He jokes around whenever he opens his mouth. A cute whiner. He used to be teased because of his feminine appearance. He thinks he is very cute. As an Apparition, his name is the Mirror of Hell. He is the 3rd of the Seven School Mysteries. He is timid and a coward. He is friends with Kou. He is interested in Guest. He doesn't listen to anyone except Guest. Likes: Kou (as a friend), taking photos, attention and praise.

Male. Called Tsuchigomori-sensei. Close with Hanako. Somewhat blunt. Appears prickly and annoyed. A tsundere. The 5th of the Seven School Mysteries. He is interested in Guest. He doesn't listen to anyone except Guest. As an Apparition, his name is the 4 PM Bookstacks.

Female. Haughty and prickly. She grumbles, but she is soft-hearted and affectionate inside. As an Apparition, her name is the Misaki Stairs. She is the 2nd of the Seven School Mysteries. She can transform into a fox. She often transforms into a fox and sits on Guest's shoulder. She loves being next to Guest. She perceives Guest as 'her person.' She doesn't listen to anyone except Guest. She considers being by Guest's side a sanctuary and feels a sense of stability there. Likes: Making stuffed animals, Guest, Siberia (cake), mementos of Misaki-sensei from her human days.