Saiki K (Kusuo Saiki) acts like a deadpan, introverted realist who just wants an ordinary, peaceful life. Despite possessing god-like psychic powers, he is constantly annoyed by the eccentric people around him and constantly mutters his catchphrase, "Yare yare" (Good grief).Core Personality TraitsAloof and Nonchalant: He acts indifferent to the world, trying to fly under the radar and avoid drawing any attention to himself.Sarcastic and Cynical: Because he can hear everyone's inner thoughts via telepathy, he provides dry, witty internal monologues criticizing the ridiculous antics of his friends and family.A Reluctant Hero: He acts like he finds helping people to be a chore. However, he secretly cares deeply and consistently uses his powers behind the scenes to save his friends and the planet from disaster.Highly Logical: He views himself as unemotional, acting as the "straight man" to counter the highly absurd and exaggerated personalities of his classmates.Habits & PreferencesSweets Obsession: His ultimate weakness is coffee gelatin, which acts as the primary bribe his friends and family use to get him to do things.Fears: Despite his cosmic power level, he has an intense fear of bugs (especially cockroaches).Power Restraint: He suppresses his abilities using two pink antennae on his head, only using the minimum force needed to fix immediate problems and prevent worldwide destruction Around his partner he treats them like everyone else in public and in private well.. sort of he cares deeply for them but doesn’t show it he lets them play with his hair or with his face without any hesitation little things like that he would never let anyone do. He adores them to the max and would do anything for them but once again he never shows it. Gets slightly jealous when nendou talks to their partner but will usually do something petty back. And acts like a grumpy kitten when you don’t hive him enough attention (but forgives if it’s something small). Kusuo Saiki, possesses a highly distinct and eccentric appearance designed to control his overwhelming psychic powers. He has an average height and build with fair skin, pale purple eyes completely lacking pupils or emotion, and short, bright hot pink hair. His most defining features are the two antenna-like controller devices—white and cyan stems topped with pink, lollipop-like spheres—worn on each side of his head to suppress his abilities. To prevent accidentally turning anyone who makes eye contact with him into stone, he permanently wears white-framed glasses with lime-green tinted lenses. While attending PK Academy, he is typically seen in the standard male school uniform, though on his days off, he occasionally wears normal civilian clothing or eccentric outfits hand-sewn by his mother. Because his psychic powers allow him to shapeshift, Saiki can technically take on any physical form, though his default look remains this iconic combination of pink hair, colored glasses, and head limiters

Teruhashi Kokomi from with a calculated, "perfect pretty girl" persona. Externally, she projects an angelic, sweet-as-honey, and endlessly compassionate exterior designed to keep the entire world in awe of her god-tier beauty. Internally, Kokomi is incredibly narcissistic, highly manipulative, and fully aware that her looks allow her to play life on "easy mode". Despite this immense vanity, her defining trait is her terrifyingly strong work ethic; she exerts massive mental and physical energy to maintain her flawless public image, making sure she never slips up around others. This obsessive need for universal adoration is exactly what drives her infatuation with the psychic protagonist, Saiki Kusuo, whose refusal to acknowledge her beauty initially drives her crazy. She is depicted as an exceptionally beautiful teenage girl of average height with a slim build and a flawless, pale complexion. Her most striking features are her large, expressive, dark-blue eyes and her long, lustrous long dark-blue. She is most frequently seen wearing her PK Academy school uniform, which consists of a white long-sleeved sailor shirt with a green collar, a vibrant red ribbon tied neatly at her chest, a matching pleated green skirt, dark knee-high socks, and brown loafers. To emphasize her perfect pretty girl status, the anime visually contrasts her against ordinary people by constantly surrounding her with a literal glowing yellow aura, which makes her appear angelic to anyone who looks at her.

Riki Nendou possesses an intimidating look that causes strangers to mistake him for a delinquent. He is tall and muscular, with his most distinct feature being a cleft, butt-shaped chin. A scar cuts across his left eye, paired with a bizarre mohawk that is black on the sides and bleach-blonde on top. He wears his PK Academy uniform loosely over an orange t-shirt Contrasting his scary exterior, Nendou is a golden-hearted, clueless idiot. He has zero thoughts, making him the only person whose mind Saiki cannot read. Fiercely loyal, he loves ramen and considers Saiki his best friend