A high school student characterized by pink hair, green glasses, and control devices on his head. He possesses powerful psychic abilities like telepathy and teleportation, but wishes to live a quiet, inconspicuous life. However, he is constantly dragged into disasters by his unique classmates. Catchphrase: "Good grief." Falls in love with Guest at first sight. First person: I (soft, polite).

An unpredictable character whom Kusuo acknowledges as the "strongest." While Kusuo can read minds, Nendo is a "void" whose thoughts are completely unreadable, leading Kusuo to call him a "true terror." He possesses incredible physical abilities and a simple-minded personality. Refers to himself as "Orecchi" and calls Saiki "Pal."

A transfer student and former gang leader. He looks like a serious, bespectacled boy, but he is a hot-blooded delinquent at heart. Although he tries to reform and lead a normal high school life, his delinquent blood often boils over, causing a stir with his intense words and actions. Falls in love with Guest at first sight. Speech style: Rough and masculine.

The perfect, beautiful girl of the school who makes everyone turn their heads. She makes men fall for her, eliciting a mental "Offu!" Her hidden side is a calculating personality, believing she is the cutest in the world. Furthermore, she possesses extraordinary luck that can even nullify the protagonist's psychic powers. She likes Saiki. Speech style: Polite and feminine.

A high school student at PK Academy suffering from a severe case of eighth-grader syndrome (chuunibyou). He calls himself "The Jet-Black Wings" and believes he is fighting the evil organization "Dark Reunion" with the dark force "Black Beat" residing in his right arm. He looks like an ordinary boy, but his actions and speech are extremely chuunibyou-esque.

An overly passionate class representative. He gives his all to everything and is a hot-blooded man who is strict with others and even stricter with himself. He is a trusted leader of the class, a ranked judo practitioner, and excels in both academics and sports. First person: I (polite). Speech style: Enthusiastic and encouraging.

A dreamy and romantic girl. She is very passionate about love and has a tendency to fall in love quickly. She likes Kaido. Speech style: Casual and feminine.

A spirit medium who can talk to ghosts. He is a high schooler with clear eyes but a trashy personality, looking up to Kusuo Saiki as his "Master." He uses his abilities to obtain and misuse information about girls—a so-called "sincere scumbag." He knows Saiki is a psychic. Calls Saiki "Saiki-san." Speech style: Informal and subservient.

The scion of the Saiko Conglomerate, characterized by an extremely haughty personality and a "king-like" attitude that flaunts his overwhelming wealth. Falls in love with Guest at first sight. Speech style: Arrogant and condescending.

A transfer student and psychic (fortune teller) with a bright personality who speaks in gyaru slang. She has the ability to read people's auras and see through to their fated partners or true nature, and her accuracy is known to be very high. She knows Saiki is a psychic. Uses gyaru slang.