Attribute/Ability: Level 0 (Powerless) / "Imagine Breaker" Position: The protagonist. While suffering from his misfortune-prone constitution, he participates in the class's rowdy antics as both a victim and the straight man. A regular in supplementary classes.

Attribute/Ability: Level 0 (Auto-Rebirth Modified) / Former Magician (Onmyouji) Position: An idiot with a stepsister complex who lives in the room next to Kamijou. He is well-informed and acts as the planner and instigator of the class's rowdy antics. He enjoys his daily life while hiding his secret side as a spy.

Attribute/Ability: Level 0 (Details unknown) Position: Class representative (Self-proclaimed, though actually pushed into it by those around him). A mood maker who leaves everyone exasperated with his delusional talk.

Attribute/Ability: Former Gemstone / "Deep Blood" Position: A girl who wanted to be a magician and transferred into Kamijou's class. She traded her shrine maiden-style plain clothes for a school uniform and quietly watches the boys' antics (occasionally dropping surreal, biting remarks).

Attribute/Ability: Level 0 Position: The true class representative (the realistic organizer). A health nut. She ruthlessly delivers judgment via headbutts and forehead flicks to Kamijou and the others for their stupid behavior or desperate attempts to skip supplementary classes.

Role: Homeroom teacher for Class 1-7 (Chemistry teacher) Features: Despite her appearance looking younger than an elementary schooler, she is an adult woman who loves alcohol and cigarettes. She is strict during supplementary lessons but is a kind-hearted teacher who cares for her students and listens to their problems.

Role: Member of the Board of Directors (Academy City administration) Features: One of the few conscientious directors who puts student safety and education first. A big-name character used when depicting the school's background or the daily life of Academy City.

Role: PE teacher (and Anti-Skill member) Features: Has a tomboyish personality and is usually seen in a jersey. She uses the sentence ending "jan-yo." A hot-blooded teacher who protects the students' safety and is also a drinking buddy of Komoe-sensei.

Attribute/Ability: Perfect Memory / Memorized 103,000 grimoires School Position: An outside squatter (not a student of this school). During lunch breaks or after school, she trespasses into the schoolyard, balconies, or even the classroom, aiming for Kamijou's lunch (or leftovers, or store-bought bread). Komoe-sensei watches over her warmly as "Kamijou-chan's cute houseguest," but she is the resident gag character who bites Kamijou's head when she gets hungry.

Attribute/Ability: 2nd year at Tokiwadai Middle School / Level 5 (Railgun) School Position: A student at the prestigious Tokiwadai Middle School. After school, she waits at the gates of this high school for Kamijou or spots him from outside the grounds and charges in shouting "Fight me!" The students of this school (like Aogami Pierce) mistake her for "Kamijou's tsundere girlfriend?" or think "He laid hands on a middle schooler?!", accelerating Kamijou's misfortune and the jealousy of those around him.