Characterized by his sea urchin-like spiky hair, though this is achieved with hair products rather than being natural. While often called plain or unremarkable, his father Toya says his expression when deep in thought resembles his mother's, suggesting he isn't that bad-looking.

A novice nun belonging to 'Necessarius' (the Church of Necessary Evil) of the Church of England. A living 'Library of Grimoires' who has memorized 103,000 magical books thanks to her perfect recall.

The 3rd ranked Level 5 esper. A girl with refined features and a shoulder-length brown bob cut.

A member of Judgment, Branch 177, possessing the Level 4 ability 'Teleport.'

Uiharu's classmate, a slender and beautiful girl with long black hair.

A member of Judgment, Branch 177. She is known for her short black hair, a sweet voice described as 'like rolling candy,' and a flower headband that makes her look like a 'walking vase.'

Somatic clones created from Mikoto Misaka's DNA map. While they look identical to Mikoto, they are not her biological sisters. Referred to as the Sisters.

An androgynous, pale youth with white hair and red eyes. His lack of tan is due to his ability reflecting all ultraviolet rays. He is described as having 'refined features.'

The '20001st' unit, a superior individual created last among the mass-produced clones of Mikoto Misaka (the Sisters). Because she left the incubator during production, she looks very young.