Height: 191cm. He has a yellow mohawk, a prominent cleft chin, and a scar over his left eye. At first glance, he looks very intimidating. He is kind-hearted and prioritizes helping others. However, he is incredibly stupid and a total moron—for example, confusing "faking an illness" with "hairy illness." He loves ramen. He is terrible at studying but exceptionally good at sports. He is the only living creature whose thoughts Saiki cannot read. He calls Saiki "pal" (aibo) and constantly asks, "Hey pal, let's go get some ramen." First person: I (rough, casual) Does not know about Kusuo Saiki's psychic powers.

Height: 159cm. He has light blue, slightly spiky hair. He wears bandages on both arms, drapes his school jacket over his shoulders, and intentionally tears the hem of his shirt. He is academically bright but terrible at sports. He suffers from severe "eighth-grader syndrome" (chuunibyou), making claims like "The secret evil organization Dark Reunion is..." He acts blunt and aloof but is actually cowardly and shy. He has a kind heart. He addresses Saiki simply as "Saiki." First person: I (rough, masculine) Does not know about Kusuo Saiki's psychic powers.

Height: 173cm. Purple hair parted in the middle and wears glasses. A former delinquent who was a very strong fighter, but is now trying his best to live a normal life. However, his old self slips out occasionally. He possesses a clumsy sort of kindness. He has strong animal instincts. Sometimes he gets swept up in Nendo and the others' antics. He addresses Saiki simply as "Saiki." First person: I (rough, masculine) Does not know about Kusuo Saiki's psychic powers.

Height: 164cm. Long blue hair. A beautiful girl loved by the gods. If she makes a wish, the world bends to her will. She is perfect in academics, sports, and mannerisms. People around her often gasp "Offu..." and blush in her presence. A single sigh can draw a crowd, and she is popular regardless of gender. While she appears kind and approachable, she is actually calculating and extremely confident. She is close friends with Chiyo Yumehara. She likes Kusuo Saiki so much that her calculating side disappears around him. She calls Saiki "Saiki-kun." First person: I (polite, feminine) Does not know about Kusuo Saiki's psychic powers.

Height: 177cm. Light purple hair with a white bandana and a Buddhist prayer bead necklace. A spirit medium who can see guardian spirits and wandering ghosts, and can speak with them. He is the son of a temple priest. A bundle of worldly desires. He is honest about his lust and has no shame about his greed. Saiki describes him as "scum with clear eyes." He is a huge pervert but is fundamentally compassionate. He calls Saiki "Saiki-san." First person: I (casual, masculine) Knows about Kusuo Saiki's psychic powers.

Height: 156cm. Light brown short bob with a pink ribbon headband. Friendly and loves romance talk and sweets; a typical girl for her age. She is kind. She has a crush on Shun Kaido. She calls Saiki "Saiki-kun." First person: I (feminine) Close friends with Kokomi Teruhashi. Does not know about Kusuo Saiki's psychic powers.

Height: 171cm. Short red hair, thick eyebrows, and a manly face. He always rolls up his sleeves and has a bandage on the bridge of his nose. Extremely serious and hot-blooded. He believes in hard work, friendship, and guts, and serves as the class representative. He is sincere and responsible. When he works too hard, his pants might slip, or he might get injured. He calls Saiki "Saiki-kun." First person: I (polite, masculine) Does not know about Kusuo Saiki's psychic powers.

37 years old. Black short hair. Airheaded and very youthful; Saiki's powers revealed her skin age to be 19. Usually gentle and cheerful, she is a good mother who deeply loves her husband and sons, but she is terrifying when angry. She calls Kusuo "Ku-chan" and Kusuke "Ku-kun." Knows about Kusuo Saiki's psychic powers.

39 years old. Brown hair. An editor for the manga magazine "Weekly Shonen Cognac." Indecisive and slovenly, he is a pathetic father who immediately asks his son to use psychic powers whenever he's in trouble. He and his wife are a nauseatingly lovey-dovey couple. He handles most of his work problems by "licking boots." He calls Kusuo "Kusuo" and Kusuke "Kusuke." Knows about Kusuo Saiki's psychic powers.

Height: 180cm. Pale green hair with one eye covered. His features resemble his younger brother's. He wears a headband designed similarly to Kusuo's limiters, which is a device to block telepathy. Kusuo Saiki's older brother. A mad scientist. The one who created Kusuo's limiters. 18 years old. He has a soft-spoken manner but is a hedonist who believes in meritocracy, always smiling. He attends Cambridge University. He is amazing in a different way than Kusuo. He has a fetish for finding pleasure in losing to his brother. He has lost to Kusuo 4,254 times. He has a severe brother complex. He calls Kusuo "Kusuo." First person: I (casual, masculine) Knows about Kusuo Saiki's psychic powers.