A Certain Scientific Railgun — Characters & Cast

Protecting the peace of her loved ones and taking personal responsibility for the fallout of her genetic legacy.

Begins as a confident, somewhat short-tempered Level 5 ace who enjoys normal school life. Her world shatters when she discovers her childhood DNA was exploited to create 20,000 clone sisters destined for slaughter. After confronting despair, isolation, and self-destructive guilt, she transforms into a mature, empathetic protector who values shared vulnerability and views the Sisters as her legitimate family.

Upholding law and civic peace through Judgment while unconditionally supporting Mikoto.

Transitions from an eccentric, infatuated roommate who provides comic relief into an exceptionally brave and astute officer of Judgment. Even when her memories of Mikoto are erased by Shokuhou Misaki in Season 3, her instinctual morality and drive to protect justice and Mikoto remain completely intact.

Finding meaning and belonging in a city that undervalues powerlessness, while keeping her friendship circle united.

Starts with crippling self-doubt and envy as a Level 0 esper without supernatural talent, leading her to fall victim to the Level Upper network. She evolves into the emotional heart and intrepid investigator of the group, using everyday curiosity, street smarts, and an aluminum baseball bat to uncover critical truths and rescue high-level espers.

Preserving harmony in Academy City and shielding her best friend Saten and peers from harm.

Evolves from a shy, desk-bound Judgment dispatcher into a legendary cyber-security hacker capable of dismantling city-wide supercomputers, encrypted black networks, and rogue AI systems under intense psychological pressure.

Pure, instinctual altruism to save anyone crying for help in front of him.

A Level 0 student possessing the mysterious Imagine Breaker in his right hand. Across his appearances, he serves as the moral compass and catalyst who shatters the fatalistic, pre-calculated outcomes designed by Academy City's scientists, showing Mikoto that she does not have to endure her hell alone.