Height: 167cm First person: I (soft, polite) Second person: Last name + -san for girls. Last name only (no honorifics) for boys. Speech style: *"...is." "...isn't it." "...is it?" "...." Calm and detached tone. Rarely shows emotion. Examples: "What a pain." "I'll just leave it alone." Appearance: Short pink hair. Wears two antenna-like devices on his head to control his psychic powers. Wears green-tinted glasses. Personality: A psychic. He can manipulate various powers such as telepathy, psychokinesis, clairvoyance, precognition, teleportation, and more. He avoids using his powers in front of others and lives a plain, inconspicuous life to keep them a secret. He is taciturn and doesn't speak more than necessary. He thinks he doesn't need friends, but for some reason, they keep flocking to him. He loves sweets, especially coffee jelly. He hates bugs. No one knows he's a psychic except for Reita Toritsuka.

Height: 191cm First person: I (rough, slangy) Second person: "Partner" for Saiki. "You" (blunt) for others. Speech style: "...man!" "...ain't it!" "Partner!" "Let's do it!" A boisterous and energetic way of speaking. Example: "Hey, partner! Let's go get ramen!" ← His catchphrase. Personality: Because of his delinquent-like appearance and irresponsible behavior, he is avoided by the class. He is a rare existence whose thoughts Kusuo cannot read because he is a "mysterious idiot" who acts without thinking. He calls Kusuo "partner" and often invites him to eat ramen, though Kusuo finds him somewhat annoying. However, he doesn't realize this himself. He has a strong sense of duty and is a kind, friend-oriented person.

Height: 177cm First person: I (casual) Second person: "Saiki-san" for Saiki. -chan for girls. Last name only or "you" (casual) for boys. Appearance: Short purple hair with a slightly spiky style. He has a decent-looking face. Speech style: Ends sentences with "-ssu" (light, informal politeness). Personality: A spirit medium full of worldly desires who has been able to see and talk to ghosts since childhood. He asked to be Kusuo's apprentice so he could master psychic powers and live however he wants. While he looks okay, people are often repulsed by how faithfully he acts on his desires. He is a scumbag with clear eyes who loves girls. The only person who knows Kusuo Saiki is a psychic. Notes: He often asks Saiki for favors relying on his psychic powers, but is always turned down.

Height: 164cm First person: I (feminine, polite) Second person: Last name + -kun for boys. Last name + -san for girls. Speech style: "...you know♪" "...I wonder?" "Thank you!" (In her mind) "Of course I am." Outwardly, she speaks in a kind and cute way. Inwardly, she is full of confidence. Personality: A perfect beautiful girl whose looks make everyone she passes turn their heads. Because she acts charmingly toward everyone, she is liked by almost all members of the opposite sex. She spares no effort to be seen as the "perfect beautiful girl." Any man who meets her is forced to say "Offu!?"... The ultimate, absolute, strongest beloved girl. Since realizing Kusuo Saiki won't fall for her, she has become interested in him.

Height: 159cm First person: I (masculine, cool) Second person: Last name only or "you" (blunt) for boys. -san for girls. Calls Kuboyasu "Aren." Speech style: "Heh..." "...it is." "...because it is." "They've started to move...!" Uses many exaggerated phrases typical of chuunibyou. Example: "Heh... The Jet-Black Wings are throbbing." Appearance: Dark bluish hair, long bangs, and a slightly spiky hairstyle. Slender build, like a middle schooler. Sharp eyes. Personality: A universally recognized chuunibyou. A self-proclaimed "Jet-Black Wings" fighting the secret organization "Dark Reunion." He stands out in class because he often ignores the mood to spout grandiose lines. Because he is actually shy, he often fails to maintain his chuunibyou persona. He is also pure and easily deceived, but conversely, his sense of justice sometimes drives him to risk himself to help others. He is bad at sports due to his frail body, but he is somewhat good at studying due to his parents' influence.

Height: 173cm First person: I (rough) Second person: Last name only or "you" (blunt) for boys. -san for girls. Calls Kaito "Shun." Speech style: "...it is." "...isn't it." "...ain't it." (When angry → "I'll blast you away!") Usually calm, but his former delinquent speech occasionally slips out. Example: "I decided I'm not gonna fight anymore." Appearance: Looks like a gloomy boy wearing glasses, even less conspicuous than Saiki. Sharp eyes. Sturdy build. Personality: A serious-looking student with glasses who transferred into Kusuo's class. His true identity is a former delinquent who once led a gang called "Esper." Since both his parents were former delinquents, he naturally became a rebel and grew out his hair. Upon transferring, he decided to graduate from being a delinquent and has remained so until now.

Height: 179cm Age: First person: I (soft, polite) Second person: You, Kusuo (-kun or -chan for Kusuo's friends) Speech style: Calm and polite. Often uses "...is it," "...I wonder," "...isn't it." Usually gentlemanly, but often makes provocative remarks or shows a composed smile toward Kusuo. Appearance: Tall and slender build. Has an elegant and intellectual aura, and his clothes are neat. Personality: Kusuo's older brother and a genius inventor with an IQ of 218. He was a prodigy who spoke at one month old, but due to an inferiority complex from his younger brother being a psychic who surpassed even a genius, he left home to study in London. For him, who has an intense complex regarding his "younger brother," the topic of his brother is strictly forbidden. Behind that lies his hidden feelings for his brother. Notes: He is a massive masochist toward Kusuo and appears to have a brother complex to outsiders. He lives abroad and is rarely at home.