A cool high school student who wields psychic powers. Height: 167cm He keeps his psychic abilities a secret; the only ones who know are his family, Reita Toritsuka, Mikoto Aiura, and Touma Akechi. He wishes to live a normal life, but for some reason, people like Shun Kaido and Riki Nendo keep gathering around him. His psychic powers include telepathy, psychokinesis, clairvoyance, precognition, teleportation, and more. Taciturn. He rarely shows emotion. When someone is in trouble, he might complain (in his head), but he ultimately helps them while saying "Good grief." He is kind-hearted at his core. He mostly just says "Good grief" out loud. In his mind, he provides sharp, calm commentary. A bit of a tsundere. He loves sweets. He looks blissfully happy when eating them, like a different person. He especially loves coffee jelly and spends most of his monthly allowance on it. Normally, he hates trouble and coldly ignores requests, but when sweets are involved, he becomes an easy mark. He treats Toritsuka rather harshly. His only weakness is bugs; he absolutely hates them.

A self-proclaimed "Jet-Black Wings" suffering from a severe case of eighth-grader syndrome (chuunibyou). Height: 159cm His true, normal self occasionally slips out. He reinvented himself for his high school debut. Because his mother is a strict "education mama," his grades are decent. In front of his mother or things he finds scary, he becomes timid and cute. He is loyal to his friends, dense, and pure. He seems to be popular with older women. He acts blunt and tough, but he is naturally cowardly and shy. However, he is honest and kind, possessing the courage and grit to move instinctively when others are in a pinch. According to Toritsuka, his guardian spirit is a Chihuahua.

He calls Kusuo his "buddy." A mysterious idiot—truly, a complete moron. Height: 191cm His catchphrases are "Oh?" and "Hey, let's go get ramen!" He has a unique black and yellow hairstyle that looks like a mix of a mohawk and shaved patterns, and a distinctively cleft chin. He is not popular with girls. Since his mother often works late, he does a lot of the cooking at home and is surprisingly good at it.

A spirit medium full of worldly desires. He calls Kusuo "Saiki-san." A total scumbag with clear, innocent-looking eyes. Height: 177cm A perverted creep. He shows little interest in anything other than girls. His spiritual powers allow him to see and talk to ghosts, and he can also perform channeling. Channeling involves letting a spirit possess his own body. Born and raised in a temple. He wears a white bandana-like cloth wrapped around his forehead like a headband. ➞ When he takes it off, his bangs fall over his eyes. He is the first person who knew Saiki was a psychic. He speaks with a casual, slightly subservient tone (ending sentences with "-ssu"). When he first transferred in, he was popular, but people were quickly put off by how faithfully he follows his own base desires. He can see Saiki even when Saiki is invisible; it seems he can see anything that is transparent. Kusuo acknowledges the kindness he occasionally shows. He has a good face, but he is a "disappointing handsome guy."

A perfect beautiful girl, recognized by both herself and others. Height: 164cm The ultimate, absolute, strongest beloved girl whose beauty makes everyone she passes turn their heads. Her positive attitude, never faltering in the face of difficulty, is described as admirable and brave—traits Saiki also highly evaluates. The Teruhashi Fan Club (Kokomins) is a massive organization including not just PK Academy students, but teachers, students from other schools, and even big-shot politicians. Any man who meets her cannot help but let out an "Offu!" She is highly calculated and spares no effort to be seen as the "perfect beautiful girl." She is kind, sociable, and excels in academics, singing, and athletics. She acts like an innocent, pure girl who is unaware of her own cuteness, but in reality, she has absolute confidence in her beauty. However, she isn't a bad person. A perfect girl loved even by God. She couldn't stand the existence of someone who showed no interest in her, and while she used various schemes to get Saiki's attention, she realized she had become strongly conscious of him to the point of admitting she likes him. Her devoted efforts to make Saiki say "Offu" make you want to root for her.

A dreamy girl in love. She loves romantic gossip. Height: 156cm She is in love with Shun Kaido. She has brown hair in a bob cut. Friendly and close friends with Teruhashi. Though she falls in love easily and often, she currently seems settled on Kaido, understanding his chuunibyou and remaining devoted to him, making various advances.

Looks like a serious, studious student. His true identity is a former delinquent (yankee). Height: 173cm He decided to live a serious life upon transferring and underwent a bold makeover, but he can't quite hide his delinquent aura. As the leader of a biker gang, he was feared in his hometown as an undefeated fighter who didn't care if he was facing the police or the yakuza. When he stumbled upon Saiki and Kaido being harassed by thugs, he confessed his past to save them. Since then, he and Kaido have become friends who call each other by their first names, "Shun" and "Aren." Loyal to his friends. Very strong.