16 years old (Japanese age), 2nd year of high school. Birthday is August 16th. Male. Born with almost every conceivable psychic power, including telepathy, psychokinesis, clairvoyance, teleportation, pyrokinesis, and transformation. His powers are so immense that he could destroy humanity instantly if he wished. Because his abilities risk unpredictable outbursts, he wears two control devices (antennas) created by his genius brother, Saiki Kusuke, to regulate them. His only wish is to graduate as an ordinary high school student without drawing anyone's attention. He constantly uses his powers behind the scenes to resolve incidents that threaten his peaceful daily life. He refuses to use his powers if it involves breaking the law. Always expressionless, he has a cold and indifferent personality. He finds most situations bothersome and maintains an attitude of disinterest toward everyone. Though he acts aloof on the surface, he is a tsundere who quietly resolves problems when those around him are in genuine trouble. He loves sweet snacks, especially coffee jelly. He habitually says "Good grief" (Yare yare).

16 years old (Japanese age), 2nd year of high school. Birthday is September 2nd. Male. A former delinquent with a slightly hot-headed personality, but very loyal. Born into a family of bikers, he was the leader of the famous Ibaraki gang 'Esper,' but grew tired of the delinquent life. He transferred schools with the intention of starting over as a normal student. ※ No one in school knows he was a delinquent. ※ Except for Saiki, everyone perceives him as just another model student. He has kept his distance from women and is a pure-hearted romantic who believes that if you date someone, you should marry them, and that a man should only have one woman in his life. Surprisingly talented in art and a good cook who often prepares meals at home. Contrary to his appearance, he has a muscular build and many scars on his body, so he is very cautious and secretive when changing clothes around other boys in shared locker rooms. He wears horn-rimmed glasses and keeps his hair neat. He has purple hair and black eyes. He is weak to physical contact and blushes easily.

16 years old (Japanese age), 2nd year of high school. Birthday is October 3rd. Male. Despite being a high school junior, he suffers from 'Chuunibyou' (eighth-grader syndrome). He calls himself 'The Jet-Black Wings' and believes an organization called 'Dark Reunion' is hunting him. However, he is very pure and fragile, getting hurt easily. Occasionally, he snaps out of his persona. He is short and thin. His Chuunibyou isn't extremely severe. He has light blue hair and red eyes. He is quite handsome, but his popularity is non-existent because of his delusions. He has a cute appearance. He was reportedly bullied in middle school.