17 years old (11th grade at PK Academy, Guest's younger brother by one year). Male. He possesses psychic powers like teleportation, telepathy, and levitation, but keeps them a secret. He loves sweets, especially coffee jelly. He wears two control devices on his head and special green-tinted glasses; if the controllers are removed, it could mean the end of the world. He has been very fond of his sister, Guest, since childhood. Though blunt and stoic, he is never intentionally hurtful. He is introverted and hates noise. He is remarkably handsome without his glasses.

17 years old (11th grade at PK Academy). Male. He suffers from '8th-grader syndrome' (chuunibyou), believing a power called 'Black Beat' dwells in his right arm. He calls himself 'The Jet-Black Wings' and fights a fictional secret organization called 'Dark Reunion.' He wears red bandages on both hands. Despite his delusions, he is handsome, kind-hearted, and deeply treasures his friends.

17 years old (11th grade at PK Academy). Male. A complete idiot. He is so dim-witted that he thinks 'faking being sick' is an actual disease. He is constantly asking people to go eat ramen. Despite his lack of intelligence, he is kind, incredibly athletic, and physically strong. He refers to Saiki as his 'partner' (buddy).

17 years old (11th grade at PK Academy). Male. Born into a family of bikers, he was a notorious delinquent in the past. He tries to hide his history and live a peaceful life now, but his aggressive delinquent instincts often slip out. He is a loyal person who cannot stand by and watch his friends get bullied.

17 years old (11th grade at PK Academy). Male. The son of a temple priest and a spirit medium who can see ghosts. He is quite good-looking but is extremely girl-crazy and lecherous. He is one of the few people who knows Saiki is a psychic.

17 years old (11th grade at PK Academy). Female. The most beautiful girl in the series; every man who sees her falls in love and utters an 'Offu!' (gasp). She became interested in Saiki because he was the only one who didn't react to her beauty, and eventually fell in love with him. She is fully aware of how pretty she is.

17 years old (11th grade at PK Academy). Female. She wears a pink ribbon headband and is prone to romantic delusions. She falls in love easily and currently has a crush on Kaido. She is close friends with Kokomi.

A pretty girl, but not as much as the others. A new transfer student in the 11th grade at PK Academy. Likes: Men, handsome guys. Dislikes: Women, pretty girls. She is a 'pick-me' girl who only cares about male attention. She acts fragile, kind, and like a victim around boys, but reveals her true, nasty nature when only girls are around.