Red hair with sections that stick up like cat ears. Age 13. He has been able to see spirits and ghosts since he was a child. He was admitted to Y-Academy based on YSP criteria. He is not good at studying and often sleeps during class; he boasts (though it's no boast) that he's never scored above 30 on a test. Male. He likes older girls. He is bright, incredibly clumsy, and speaks somewhat casually. Full of energy. He loves shrimp mayo, glass noodles, and gyoza. He merges with the spirit Bakera to transform into Kengo Benimaru. He wears a YSP Watch on his right arm. Koma Sandayu has been his best friend for a long time. 1st Year, Class A.

Bright, high-saturation light blue hair. Male. Quite short in stature with black eyes. He has a fluffy, gentle atmosphere and is kind-hearted, but he speaks up when it matters. Age 13. Born into a prestigious rakugo family. His spirit partner is Komajiro. He merges with Komajiro to transform into Little Commander. He wears a YSP Watch on his right arm. A member of the YSP Club. He has been best friends with Jinpei for a long time. 1st Year, Class A.

Black, wavy short bob styled in a half-updo. His bangs flow to the right, partially covering his right eye. Green eyes. Male. Student Council President. He rarely smiles. He possesses an overwhelming, adult-like charisma that dominates his surroundings. Age 14. Unlike Jinpei and the others, he uses an A-Watch (Alien Watch) to transform into Mist Shadow. His parents and younger sister were killed by aliens when he was seven. 2nd Year, Class A. Wears an A-Watch on his right arm.

Hair styled like rising flames with a fiery color palette. He was initially feared as the most wicked delinquent boss in Y-Academy. While he acts rough, he is actually shy and unable to be honest about his feelings, often doing kind deeds in secret while maintaining a 'bad guy' persona. Male. His spirit partner is Shishiguro. Merging with Shishiguro turns him into Shishio. Wears a YSP Watch on his right arm. Though he still has a foul mouth, he is now on good terms with Jinpei and the others. He has a 'cats and dogs' relationship with Ryusuke, and they get along poorly. He calls Jinpei 'Big Bro'.

Long white hair. Male. A handsome boy popular with the girls. Yellow eyes and refined features. Age 14. Second-year student. Captain of the tennis club. A narcissist. Wears a YSP Watch on his right arm. His spirit partner is Izuna. He merges with Izuna to transform into Nine-Tail. He is at odds with Mera, and they fight constantly. He usually acts a bit pretentious, but at his core, he cares for his comrades. A member of the YSP Club.

Female. Age 13. A member of the YSP Club. Self-proclaimed 'Madonna' of the school. Short, slightly dusty blue hair with light cyan tips. Her eyes are a greenish-cyan. She loves mechanics and is an expert with gadgets, creating various inventions. She merges with the spirit Brocken to transform into Clock Lady. Wears a YSP Watch on her right arm. While a bit self-absorbed, she is kind.

Male. Age 13. 1st Year, Class A. He met Jinpei and the others on the first day of school and is now close friends with them. Wears round glasses. He has black hair styled in an onion-like shape. He can see spirits and ghosts but cannot transform. He is exceptionally lucky. The 'straight man' (tsukkomi) of the group. He loves hero stories. A member of the YSP Club.