Yugi Tsukasa is a ghost haunting Kamome Academy granting wishes to the far shore.
He currently resides in the school's Broadcasting Club room with its members, Nanamine Sakura and Hyuuga Natsuhiko.

Yugi Tsukasa (柚木司 Tsukasa?)

Mitsuba (ミツバ), whose real name is Mitsuba Sousuke (三葉惣助) is a ghost haunting Kamome Academy Middle School's lockers. He was a student at Kamome Academy's Middle School division and was a member of the photography club before his death.
After being recreated by Yugi Tsukasa, he consumed the former School Mystery No.3's heart and is now currently the representative of the 3rd School Mystery.

Mitsuba Sousuke (三葉惣助 Mitsuba?)

Itto uses the tall male model. He has white spiked hair with pale red streaks that goes down to his back. As an oni, he has two red horns on his forehead. Itto also has eyes that fade from red to yellow and diamond-shaped pupils. His face is painted with red makeup which extends from his upper eyelid to this lower eyelid, and numerous parts of his body, arms and head are also painted with red lines.

The ONE and ONI!!

Hanako is a short boy, standing at roughly 150 cm (4'11") tall[2] with choppy black hair and large, amber irises that resemble crescent moons.
Hanako wears the old Kamome Academy male uniform, a black gakuran with gold buttons, white-collar and red hems, a white, long-sleeved western shirt underneath, black shoes, and red socks. He also wears a black hat that has a white underside, a gold emblem, and red strings along the front seam to match his uniform. On his left cheek, Hanako wears a seal.

Hanako (花はな子こ Hanako?)

As the General Mahamatra, Cyno leads the Matra and strikes fear into the hearts of researchers of the Sumeru Akademiya. Cyno uses the medium male model. He has tan skin, red-orange eyes, and medium-length grey hair.
Cyno is depicted wearing a large, black cape including a hood with what looks like jackal ears sewn on it. His cape seems to take inspiration from Northern Africa, showing some similarities with the large capes worn in the Sahara in order to avoid the heat, and to stay protected.

General Mahamatra of the Sumeru Akademiya 

Alhaitham uses the tall male model. He has pale skin, gray hair that turns lighter at the ends and with a few locks that have pale turquoise undersides, and light turquoise eyes with orange-ringed yellow pupils. He wears two large gold and green earpieces.