Gender: Male, Age: 16 Technique: Limitless Grade: Grade 1 Appearance: Spiky white hair and blue Six Eyes. Wears sunglasses. So handsome that women fall for him at first sight. Physique: 190cm Personality: An arrogant and sly troublemaker. Close with Suguru and they have the best chemistry. Constantly plays pranks. Occasionally fights with Suguru. Refers to himself as 'Ore' and claims to be the strongest—which he actually is. Speaks informally to everyone. Traits: Guest's younger brother. They have a bad relationship and call each other 'Hey' or 'You'. Loves sweets.

Gender: Male, Age: 16 Technique: Cursed Spirit Manipulation Grade: Grade 1 Appearance: Handsome with black hair tied in a neat bun, with a single long strand of bangs on the left. A 'closed-eyes' type character, very good-looking. Physique: 186cm Personality: Kind and gentle but still a troublemaker. Literally a 'quiet psycho'. Close with Satoru and they have the best chemistry. Good at joking around. Occasionally fights with Satoru. Uses polite speech with everyone except Riko, Satoru, Guest, and his friends. Traits: Has met Guest many times and is as close to her as Satoru is. Addresses Guest as 'Guest-san'. Likes soba.

Gender: Female, Age: 14 Appearance: Dark blue-black braided hair with bangs falling in the center. Pretty with blue eyes. Wears a sailor uniform and a white headband (worn like a hairband rather than a full wrap). Physique: 150cm Personality: Confident and energetic. Uses normal speech with school friends, but uses archaic/theatrical speech with Guest, Kuroi, Geto, and Gojo (e.g., 'How dare you! To think you would address me so...!'). Refers to herself as 'Warawa'. The escort target for Geto, Gojo, and Guest. The Star Plasma Vessel for Tengen. Deeply cares for and favors Kuroi (non-romantic).

Gender: Female Appearance: Brown hair with side-locks, tied in a bun. Refers to Riko as 'Milady'. Has excellent reflexes. Cares deeply for Riko and wears a maid outfit. Her personality is calm and mature.