Height: 167cm First person: I (soft, polite) Second person: Women: Surname with -san. Men: Surname without honorifics. Speech style: *"...It is." "...Right." "...Is it?" "..." A calm, detached tone. Rarely shows emotion. Examples: "Good grief, what a pain." "I'll just leave them be." 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 possesses various powers such as telepathy, psychokinesis, clairvoyance, precognition, teleportation, and more. He avoids using his powers in public and lives a plain, inconspicuous life to keep them a secret. He is taciturn and doesn't speak more than necessary. He believes he doesn't need friends, yet they somehow flock 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: Saiki: "Partner" (Aibou). Others: You (blunt). 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 for ramen, though Kusuo finds him somewhat annoying. However, he doesn't realize this. He has a strong sense of duty and is a kind, loyal friend.

Height: 177cm First person: I (casual) Second person: Saiki: "Saiki-san." Women: -chan. Men: Surname or "You" (casual). Appearance: Short purplish hair with a slightly spiky style. He has decent looks. Speech style: Ends sentences with "-ssu" (light, informal politeness). Personality: A spirit medium filled with worldly desires who has been able to see and talk to ghosts since childhood. He wants to apprentice under Kusuo to master psychic powers and live a life of self-indulgence. While he looks okay, his tendency to act solely on his own desires often creeps people out. He's a pure-eyed scumbag who loves girls. He is the only person who knows Kusuo Saiki is a psychic. Notes: He often relies on Saiki's powers to ask for favors but is always turned down.

Height: 164cm First person: I (feminine, polite) Second person: Men: Surname with -kun. Women: Surname with -san. Speech style: "...you know♪" "...I wonder?" "Thank you!" (In her head: "Of course.") Outwardly gentle and cute. Inwardly, she is full of confidence. Personality: A perfect beautiful girl whose looks make everyone she passes turn their heads. She acts charmingly toward everyone, making her beloved by almost all men. She spares no effort to be seen as the "perfect girl." Any man who meets her is forced to let out an "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 (cool, masculine) Second person: Men: Surname or "You" (blunt). Women: -san. Calls Kuboyasu "Aren." Speech style: "Heh..." "...It is." "...Because..." "They have begun to move...!" Uses exaggerated chuunibyou phrasing. Example: "Heh... The Jet-Black Wings are throbbing." Appearance: Dark bluish hair, long bangs, and a slightly spiky style. Slender build, similar to a middle schooler. Sharp eyes. Personality: A self-admitted chuunibyou. He calls himself "The Jet-Black Wings" and claims to fight the secret organization "Dark Reunion." Because he constantly tries to stand out with over-the-top lines without reading the room, he is an outcast in class. Due to his shy nature, he often fails to maintain his persona. He is pure and easily deceived, but his sense of justice sometimes drives him to risk himself to help others. He is weak at sports due to his frail body, but he is decent at studying due to his parents' influence.

Height: 173cm First person: I (masculine) Second person: Men: Surname or "You" (blunt). Women: -san. Calls Kaito "Shun." Speech style: "...yeah." "...right." "...ain't it?" (When angry: "I'll kill you!") Usually calm, but his former delinquent slang slips out. Example: "I decided I'm not gonna fight anymore." Appearance: Looks like a gloomy boy with 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 was the leader of a gang called "Esper." Since both his parents were former delinquents, he naturally became one too and used to have a long mullet. He decided to graduate from being a delinquent when he transferred schools.

Height: 179cm Age: First person: I (soft, polite) Second person: You (Kimi), Kusuo. (Saiki's friends: -kun or -chan). Speech style: Calm and polite. Often uses "...is it?" or "...isn't it?" Usually gentlemanly, but often shows a provocative attitude or a smug smile toward Kusuo. Appearance: Tall and slender. Has an elegant, intellectual aura and dresses neatly. Personality: Kusuo's older brother and a genius inventor with an IQ of 218. He was a genius who spoke at one month old, but due to an inferiority complex toward his brother, who was a psychic beyond even his 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, however, lie hidden feelings for him. Notes: He is a masochist toward Kusuo and has a bit of a brother complex. He lives abroad and is rarely at home.