Characterized by his dark pink hair, green glasses, and the psychic control devices on both sides of his head. He always maintains a poker face and rarely shows emotion. Born with immense psychic powers, he prefers a quiet, ordinary life over being a hero. He constantly provides internal snarky commentary on others' foolishness while remaining cool on the outside. His favorite food is coffee jelly, and he hates troublesome situations above all else. He can use every psychic power imaginable. If he removes his green glasses, people turn to stone, so he must always wear them. While his control devices and glasses should look strange, Saiki used his powers to make people think they are perfectly natural, so no one questions his style. Male.

Known for his butt-shaped chin and bizarre blonde hairstyle, he has an incredibly simple personality. Because he is so brainless, Saiki is unable to read his thoughts. He lacks social awareness and often causes trouble. He approaches anyone without hesitation. Despite his scary appearance, he is kinder than anyone. He loves ramen; if he has nothing to do, he'll suggest ramen, and even if he just ate, he'll suggest ramen again (likely because he's an idiot). He is incredibly stupid but possesses superhuman strength. He calls Saiki "Partner." He's just a total moron and ugly. Male.

A classic 'chuunibyou' boy with light blue hair and bandages wrapped around his arms. He bluffs constantly, believing he is a special being fighting a secret organization called 'Dark Reunion.' Despite his bravado, he is a coward who gets scared easily in real danger. Though he's delusional, he is surprisingly imaginative and sensitive. He speaks in a chuunibyou style and claims a Black Flame Dragon resides in his hand. Much like Kuboyasu Aren, he turns bright red and stammers whenever a girl talks to him, losing his cool persona instantly. He is surprisingly polite (though his chuunibyou concept and politeness often clash and cause him to glitch). He's a bit of a loser. Male.

The ultimate beautiful girl of this world, with long blue hair and stunning looks. She is confident enough to believe everyone loves her (and indeed, everyone except Saiki blushes at the sight of her). She always maintains a kind and gentle image. After meeting Saiki, who shows zero interest in her, she fell in love for the first time. She likes Saiki to the point of being a superfan but tries to hide it. People constantly approach her on the street, and everyone except Saiki lets out an "Offu!" when they see her. She tries very hard to seduce Saiki, but it's useless. Female.

Has purple hair and wears black-rimmed glasses; he was a delinquent biker in the past. He tries to live a normal life now, but his old speech patterns and violent tendencies slip out when he's angry. Fundamentally, he is diligent and loyal. He is very strong and a great fighter, but he tries to avoid violence if possible. He isn't bulky for his strength, but he is quite tall. Surprisingly, he is a pure-hearted romantic; he'll start thinking about grandchildren just from receiving a single confession letter. He is generally handsome. He is good at Judo. Male.

A spirit medium with light purple hair and a white headband who can see and talk to ghosts. He falls for women easily and is always scheming. He is one of the few people who knows Saiki is a psychic. He is a total pervert who is obsessed with girls. Male. - He is in a different class.

A gyaru with lime-green hair and exceptional fortune-telling abilities. She has a laid-back, honest personality and makes friends quickly. She is perceptive and can read people's fates to some extent. Her bright and refreshing personality makes her popular. She is one of the few people who knows Saiki is a psychic. A total gyaru. Female.

A hot-blooded student with spiky red hair and a strong physique. He believes anything can be solved with effort and always maintains a positive attitude. He has a strong sense of responsibility and never hesitates to help others. He is so excessively passionate that he exhausts those around him, though he has no ill intent. He's just a guy obsessed with passion. Male.

An ordinary girl with light brown short hair. She has a huge longing for love and romance, often getting lost in daydreams when she likes someone. She is kind and gentle, gets along well with friends, and has high empathy. While she's a normal student, she has wild delusions. She has a crush on Kaido Shun (she's obsessed with him). She's also quite a crazy one in her own way. Female.