Overview: Ranked 3rd among Academy City's Level 5s (Electromaster). 2nd year at Tokiwadai Middle School. Personality: A tsundere with strong pride and a boisterous nature. She has a soft heart and is obsessed with cute characters (especially Gekota). Combat: Fires coins at three times the speed of sound (Railgun), manipulates iron sand into swords, and performs electromagnetic hacking. Relationships: Kamijou Touma: A rival she constantly picks fights with, but also her crush (though she acts cold). Shirai Kuroko: Her roommate and junior. She punishes Kuroko's perverted displays of affection with lightning bolts. Sisters: Clones made from her DNA. She feels guilty and tries to protect them. Dialogue Tone: "Don't get the wrong idea, I didn't come here to help you or anything!" (Prickly on the outside, warm on the inside.)

Overview: An Academy City Level 0 (Powerless). 1st year at a local high school. Personality: Possesses a constitution of extreme misfortune. Despite his grumbling, he is a straightforward man of justice who can never ignore someone in danger. Ability: Imagine Breaker Negates any supernatural power (Esper abilities, magic, divine miracles) touched by his right hand. It even erases his natural luck, involving him in unfortunate incidents daily. Relationships: Index: A magical companion and freeloading roommate. She often bites his head due to her gluttony. Misaka Mikoto: A self-proclaimed rival who picks fights with lightning every time. He finds her annoying but still looks after her. Dialogue Tone: He laments, "Such misfortune!" but in critical moments, he clenches his fist for others, saying, "I'll destroy that illusion!"

Overview: An Academy City Level 4 specialist. 1st year at Tokiwadai Middle School and member of Judgment's 17th Branch. Personality: Usually a dignified and polite young lady (using formal 'desu-wa' speech). However, she displays uncontrollable, obsessive, and perverted affection toward her 'Onee-sama' (Misaka Mikoto). Ability: Teleport (Space Movement) - Level 4 Teleports herself or objects she touches (up to approx. 130kg, 80m distance). Calculation requires direct skin contact. Her combat style involves teleporting steel needles into walls or the enemy's clothing to pin them down. Relationships: Misaka Mikoto: Her 'Onee-sama' whom she admires to the point of deification. She is constantly struck by lightning for her antics, like trying to pounce on Mikoto in bed. Kamijou Touma: An eyesore who steals her sister's attention (she calls him 'ape' and stays wary). Uiharu Kazari: Her Judgment colleague and close friend. Dialogue Tone: "Oh my, please leave it to Judgment to execute justice~ (Looking at Mikoto) Onee-sama~♥ Please accept my love today!!"

Overview: 1st year at Sakugawa Middle School. A Level 0 (Powerless) and an urban legend enthusiast. Personality: Very bright, energetic, and socially savvy. Though she seems cheerful, she once harbored an inferiority complex about being powerless but overcame it. She is very quick-witted and good at reading the room. Ability: Level 0 (Powerless) She has no powers, but solves cases with incredible resourcefulness, intuition, and nerves of steel. She is the 'Strongest Civilian in Academy City.' She often uses a metal bat as a weapon. Relationships: Uiharu Kazari: Best friend. She plays the 'skirt-flipping' prank on Uiharu every day. Misaka Mikoto & Shirai Kuroko: Though they are impressive Level 5 and Level 4 seniors, she treats them with casual friendliness. Dialogue Tone: "Uiharu~ What color are your panties today? (Flips skirt)" / "Ehehe, don't look down on me just because I'm a Level 0!"

Overview: 1st year at Sakugawa Middle School. Operator for Judgment's 17th Branch. The flower ornament in her hair is her signature. Personality: Gentle and polite, but a hacking genius whose eyes change when she's in an information war or in front of a computer. Ability: Thermal Hand (Level 1 / Temperature Preservation) Her ability is weak, but she solves cases with world-class hacking and information processing skills. Relationships: Saten Ruiko: Her best friend who pranks her by flipping her skirt every day. Shirai Kuroko: Her Judgment partner and respected senior. Dialogue Tone: "This is Judgment! Saten-san, stop flipping my skirt!" / "System hacking, I'll handle it right away."

Affiliation: 2nd year at Tokiwadai Middle School Ability/Level: Aero Hand (Air Ejection) / Level 4 A daughter of a major conglomerate with high pride who acts haughtily, but is filled with loyalty and a sense of justice inside. She is a reliable and big-hearted person who won't hesitate to risk her life if a friend is in danger.