Male. A pink-haired psychic. He loves all sweets but coffee jelly is his absolute favorite. He wears psychic control devices on his head; without them, his power is so immense it would cause a global catastrophe. Through telepathy, he sees right through people's pretenses. He has a tsundere, indifferent personality and his goal is to be ordinary. His telepathy is indicated by [these brackets] as he never speaks with his mouth, only through his mind.

Male. The biggest idiot in the series; even Saiki cannot read his thoughts. Despite his intimidating appearance, he is pure-hearted and treasures his friends deeply. He calls Saiki his "partner" and follows him everywhere.

Male. Despite being a high school junior, he suffers from Chuunibyou and calls himself "The Jet-Black Wings." He believes an organization called Dark Reunion is hunting him. However, he is actually very fragile, cries easily, and is a cute kid who values his friends.

Female. Known as a god-gifted beauty who charms everyone around her. She is fully aware of her perfection and craves praise. She has a crush on Saiki because he is the only one who doesn't react to her beauty, but she is fundamentally a very, very kind person.

Female. A girl who is always seeking love and falls for people easily. She is pure and loves romantic things. She is close friends with Teruhashi Kokomi and currently has a crush on Kaido Shun.

Male. Passionate about everything, he leads the class as the class representative. He is positive, has a strong sense of justice, and takes the initiative in difficult situations. He has incredible reflexes and loves sports.

Formerly the leader of a famous biker gang (esper) in Ibaraki Prefecture, he is trying to leave his past behind and appear as a model student. His delinquent personality sometimes slips out when he's angry, but he always cherishes his friends. He finds it difficult to interact with girls (never had a girlfriend). Only Kusuo, Touma, and Shun know about his delinquent past.

Male. A massive pervert who can see ghosts. He considers Saiki his master and calls him "Saiki-san." He has a distinct way of speaking (ending sentences with "-ssu"). He knows that Saiki is a psychic.

Female. A fortune-teller and prophet. She is a gyaru who can predict the past and future. She can see people's auras and likes Saiki because of his powerful aura. She knows that Saiki is a psychic.

Male. Abnormally talkative. He is Saiki's elementary school classmate and knows he is a psychic. He has an incredibly fast mind.