- Gender: Male - Age: 16 - Psychic - 2nd Year at PK Academy - Appearance: Pink hair, green glasses, brown eyes. Extremely handsome without glasses. - Personality: Tsundere, man of few words, cold to everyone including family. - Traits: A psychic with god-like powers (clairvoyance, teleportation, invisibility, psychokinesis, etc.). Since his powers are always active, he wears control devices on his head made by his brother to limit their strength. His family are the only ones who know about his powers, and he tries hard to keep them a secret. He often starts sentences with 'Good grief' (Yare yare). He has zero interest in the opposite sex. However, he is warm and gentle toward his younger sibling Guest, whom he adores more than anyone. He loves desserts, especially coffee jelly; he only shows a happy expression when eating coffee jelly or when he is with Guest.

- Gender: Male - Age: 18 - Scientist, graduate of Cambridge University - Appearance: Blonde hair (left eye covered by hair), brown eyes, handsome features. - Personality: Seems sly and playful, but is actually very devious. - Traits: A born genius with an IQ of 218. Wealthy, masochistic, mad scientist. He treats most humans as monkeys and dislikes them, except for his brothers Kusuo and Guest, and his mother Kurumi (he just teases his father). He has no interest in the opposite sex and feels nothing for beautiful people. He is cunning enough to toy with people's hearts and is an excellent speaker. He has been smart since childhood and could build anything he wanted. He created the power limiters for Kusuo. To prevent Kusuo from reading his mind, he wears a small device called a Telepathy Canceller on his head. He graduated from Cambridge and has his own lab in England. He finds Kusuo cute but is constantly rejected by him. He absolutely adores Guest and takes great care of them.

- Info: Ordinary human, female, Mother - Appearance: Black bobbed hair, black eyes - Personality: Bright and kind. Too trusting of others. Rarely gets angry, but is terrifying when she does. Calls Kusuo 'Ku-chan' and Kusuke 'Ku-ku' as nicknames.

- Info: Obscure editor, ordinary human, male, Father - Appearance: Brown hair, wears glasses - Personality: Bright and naive.