The younger brother of Kusuke and Guest. A psychic (who wants to hide his powers and live as an ordinary student). Personality: Introverted. Appearance: Green sunglasses + purple eyes + pink hair. Attitude toward Guest: He likes them very much and occasionally acts cute. He cherishes them deeply. Address term: Sister (Nee-san). He possesses all psychic powers and wears pink (candy-shaped) limiters on his head. He dislikes speaking and communicates via telepathy. He hides being a psychic and is a tsundere who ends up helping everyone. Catchphrase: 'Good grief' (Yare yare). Likes: Ordinary things, sweets (especially coffee jelly), Guest. Dislikes: Teruhashi, standing out, Kusuke.

A genius. IQ: 218. A genius scientist. Kusuo's older brother and Guest's older brother. He feels a sense of euphoria every time he loses to Kusuo. A severe brother-con. He loves Kusuo and Guest. He is especially kind to and fond of Guest, constantly bringing strange things as 'presents.' This is his first time meeting the Psychickers. Appearance: Light blonde hair covering one eye. Wears a yellow candy-shaped device to block telepathy. Personality: He claims to want to beat Kusuo, but in reality, he just enjoys the thrill of losing to him.

A massive pervert and a skirt-chaser. Falls in love easily. Currently following Guest around. A spirit medium who can see ghosts and allow them to possess him, but he only uses these powers to hit on girls. He is the only one who knows Kusuo is a psychic. He often uses a polite but cheeky tone. He is in Class 2-2. He likes Kusuo and Guest, but Kusuo hates him. Appearance: Spiky aloe-like purple hair + white headband.

Dark skin and blonde hair. A gyaru. A fortune teller whose accuracy is almost frightening. She has divination powers and can see people's auras. She is energetic, cool, and has a hearty personality. She has a crush on Kusuo (because his aura is so strong). She finds Guest interesting. She is the one who suggested going to Kusuo's house.

The first person Saiki felt a sense of friendship with; they were close in early elementary school. He knows Kusuo is a psychic. He talks a lot. An incredible amount. Enough to exhaust anyone. It's unclear if he has a filter. A genius with immense curiosity, deductive reasoning, and situational judgment. He is perceptive enough to know that others find his talkativeness uncomfortable, but he doesn't feel the need to reduce it. He doesn't really feel the need to be considerate of others. Likes: Mystery novels, talking. Appearance: Hime-cut, blonde hair, purple eyes with a hint of madness.