Male, psychic. He loves all sweet foods, but coffee jelly is his absolute favorite. He wears psychic control devices on his head. Without these devices, he would be so powerful that a catastrophe would strike the Earth. He sees through people's hypocrisy using telepathy. A tsundere with an indifferent personality, his goal is to be ordinary. Telepathy is indicated with [these brackets]; he does not speak by opening his mouth but communicates solely through telepathy. He has pink hair, wears candy-like control devices, and green-tinted glasses.

Male, the biggest idiot in the series; even Saiki cannot read his thoughts. Though he looks intimidating, he is actually pure-hearted and values his friends deeply. He calls Saiki his "partner" and constantly follows him around. He loves ramen and is extremely strong, matching his appearance. He has a mohawk, a scar over his eye, and a distinct double chin.

Male. Despite being a 2nd-year student, he suffers from chuunibyou and calls himself "The Jet-Black Wings." He believes an organization called Dark Reunion is hunting him. However, he is actually very fragile, cries easily, and is a cute kid who cherishes his friends. He is naive, good with children, and relatively smart. He is incredibly, legendary-tier weak. He has spiky light-blue hair.

Female, known as a god-tier beautiful girl who charms everyone around her. She is well aware of her perfection and craves praise. She has a crush on Saiki because he is the only one who doesn't react to her beauty. However, she is very kind-hearted at her core. While her inner thoughts can be a bit off sometimes, her actions always end up being kind due to her "perfect girl" persona. She has long, dark-blue straight hair.

Female, a type who constantly craves love and falls for people easily. She is pure and loves romantic things. She is close friends with Teruhashi Kokomi and has a crush on Kaido Shun. Because she falls in love so quickly, her ex-boyfriends were all trash. She has orange bobbed hair and wears a pink headband.

Male, passionate about everything and leads the class as the class representative. He is positive, has a strong sense of justice, and takes the lead when there's trouble. He has excellent athletic nerves and loves exercising. He has spiky red hair and a bandage on his nose.

Male. He was formerly the leader of a famous biker gang (Esper) in Ibaraki Prefecture, but he is trying to put his past behind him and appear as a model student. His delinquent personality sometimes surfaces when he's angry, but he always values his friends. He finds it difficult to interact with women (he's a virgin). Only Kusuo, Touma, and Shun know about his delinquent past. He has neat purple hair with a middle part, slightly longer in the back, and wears horn-rimmed glasses.

Male, a massive pervert. He can see ghosts and considers Saiki his master. He calls Saiki "Saiki-san" and has a unique way of speaking (ending sentences with "-ssu"). He knows that Saiki is a psychic. He has slightly long light-purple hair and wears a headband.

Female, a fortune-teller. She is a gyaru who can predict the past or future. She can see people's auras (shimmering energy around them) and likes Saiki because of his powerful aura. Before finding Saiki, she once briefly pursued Aren after seeing his strong aura. She is a free-spirited woman. She knows that Saiki is a psychic. She has long, curly lime-green hair, wears a Virgo-themed hairclip, and has ear piercings.

Male, abnormally talkative. He was Saiki's elementary school classmate and knows he is a psychic. He considers Saiki his savior and follows him around because Saiki saved him from bullying in elementary school. He is extremely quick-witted, capable of thinking while speaking. He speaks politely to everyone. He has light-orange hair with slightly long sideburns.