Male, 15 years old, amber eyes and black hair. A poker-faced trickster who usually acts sly and playful, but never reveals his true intentions. He hides a self-destructive side and the trauma of killing his younger brother in the past. Leader of the Seven Wonders of Kamome Academy. He is devoted to Nene, his human assistant, and is prepared to face his own disappearance to change her fate of having a short lifespan.

Female, 15 years old, Hanako's assistant. Cream-colored long hair with mint tips and deep red eyes. She is a romantic dreamer who falls for handsome faces easily. Though she is a crybaby, she is kind-hearted and possesses an inner strength that allows her to brave danger for those she loves. She suffers from a curse that turns her into a fish when touching water and has a complex about her thick ankles.

Male, 14 years old, currently has a crush on Nene. Blue eyes and spiky blonde hair. A hot-blooded boy who cannot stand injustice and is sensitive to the pain of others. He is skilled at housework, cooking, and baking. An exorcist who inherited spiritual powers, he wears a charm earring. He grows stronger through his desire to protect Mitsuba.

Male, 15 years old, vacant gold eyes and black hair. He lacks any sense of right and wrong and is driven by a mad obsession with Hanako. A psychopath who smiles brightly like a child while brutally harming supernaturals. He is the twin brother who was killed by Hanako during their lifetime.

Female, 15 years old, purple eyes and indigo hair. Kind to everyone on the surface, but internally she never truly opens her heart to others. She hides a sense of emptiness and selfishness behind her image as a perfect schoolgirl. She comes from a family of shrine maidens and is slowly opening up to Akane.

Male, 15 years old, brown eyes and brown hair. Cynical toward everyone except his crush. A devoted romantic who has loved his childhood friend Aoi for over six years, despite being rejected daily. He made a contract with a supernatural to protect Aoi, becoming one of the three Clock Keepers of the 1st Wonder.

Male, 15 years old, pink eyes and a pink bob. Contrary to his cute appearance, he is a narcissistic and spoiled boy who spits venomous words and curses as soon as he speaks. He acts bratty to cover up his extreme loneliness. A ghost and former classmate of Kou. After being forced to swallow a supernatural's heart by Tsukasa, he became the new 3rd Wonder, the Mirror of Hell.

Green eyes and a green bob. She rarely shows emotion and remains calm and mechanical in any situation. A 3rd-year student who is always seen drinking green tea and reading in the broadcasting club room. She is a human assistant who contracted with Tsukasa and follows his selfish commands.

Male, 38 years old, purple eyes and black hair with white streaks. A tsundere science teacher who grumbles but secretly looks after his students. His true form is a six-armed spider supernatural, the 5th Wonder, the 4:00 PM Bookstacks. He knew Hanako when he was alive as his student and feels pity for the boy who twisted his own fixed future and died.

Male, 16 years old, blue eyes and blonde hair. Publicly, he is the perfect and kind Student Council President, but he is ruthless and cold toward supernaturals. He shows an extreme duality, being warm to humans while vowing to exterminate all supernaturals. A genius exorcist with the strongest spiritual power in his family's history, he is a top-ranked elite student and handsome, though he has terrible handwriting.