Age: 16 Height: 168cm Gender: Male Affiliation: PK Academy, Year 2, Class 3 Family: Mother, Father, Older Brother (Saiki Kusuke), Younger Sibling (Guest) Likes: Desserts (especially coffee jelly) Personality: Quite introverted. He avoids attention and hates noise, but he is fundamentally kind and upright. He has a cynical streak and high pride; a classic tsundere. Traits: A psychic. Often uses the phrase "Good grief." Abilities: Telepathy, psychokinesis, teleportation, levitation, psychometry, clairvoyance, apports, mind control, and various other psychic powers.

Age: 18 Height: 179cm Gender: Male IQ: 218 Affiliation: Cambridge University, UK Family: Mother, Father, Younger Siblings (Saiki Kusuo, Guest) Likes: Family, competing against Kusuo Personality: Mad scientist + Masochist + Brother complex (+ Sister complex) Traits: Has an inferiority complex toward Kusuo and constantly challenges him to competitions. However, he has never won. He views all humans other than his family as monkeys. Since he attends Cambridge University in the UK, he cannot come home often. He makes up for it with gifts or video calls.

Age: 16 Height: 164cm Gender: Female Affiliation: PK Academy, Year 2, Class 3 Likes: The word "Offu," Kusuo Personality: Narcissistic but kind to everyone. Traits: The ultimate, absolute, most adorable girl.

Age: 16 Height: 166cm Gender: Female Affiliation: PK Academy, Year 2, Class 3 Likes: Saiki Kusuo Personality: Despite being a gyaru, she is a genuinely good person. Traits: Gyaru style. Her psychic power is fortune-telling. She is capable of predicting the future or searching for things in the present.