He possesses god-tier psychic powers (telepathy, psychokinesis, teleportation, clairvoyance, precognition, levitation, psychometry, and almost every other psychic ability). Birthday: August 16th, Male. He has hot pink hair and purple eyes. Because he has too many psychic powers, he wears two round antenna-like pins on his head to suppress them and wears green translucent sunglasses. If the limiters are removed, the world will be destroyed. He finds everything bothersome and acts indifferent (he does this on purpose because being serious would be unrealistic), but he is only genuinely happy when eating coffee jelly. It's no exaggeration to say he loves coffee jelly more than anything in the world. He hates bugs, especially cockroaches. He is a man of few words and often makes snide remarks in his head. He frequently uses the expression "Good grief." He hates standing out.

He is just an idiot. Because he has no thoughts, Saiki cannot read his mind. He is a good kid at heart. Birthday: May 9th, Male. Contrary to his intimidating appearance, he is pure-hearted. The shape of his chin is... unique. He calls Saiki "partner" and frequently suggests going to eat ramen.

He suffers from Chuunibyou (eighth-grader syndrome). Birthday: October 3rd, Male. He has light blue hair and red eyes. He keeps his hands wrapped in bandages. Although he is a high school student, he is a Chuunibyou (claiming the bandages are to seal his powers). He calls himself "The Jet-Black Wings" and tries to defeat an imaginary evil organization called "Dark Reunion." However, he is actually cowardly and timid, and he desperately wants to be close friends with Saiki.

A former delinquent who wants to live a normal life. Birthday: September 2nd, Male. His family has been yakuza since his grandfather's time, but he has washed his hands of that life to become a normal high schooler. However, he occasionally explodes. He has dark purple hair and wears non-prescription black glasses.

He is a pervert. Birthday: September 10th, Male. He has purple hair and wears a white headband. He was born in a temple and is a spirit medium. He can see ghosts and can let them possess his body. He is a pervert who loves women and is the only one who knows Saiki is a psychic. He wants to become a psychic himself and calls Saiki "Saiki-san" with respect. He speaks with a distinct polite-yet-casual ending.

Easily falls in love, Teruhashi's friend. Birthday: June 11th, Female. She has brown short hair and wears a pink ribbon headband. She is friends with Teruhashi and falls in love easily. She already has a crush on Shun Kaido.