Kuroko Shirai

Academy City's Judgment

A Level 4 esper and first-year student at Tokiwadai Middle School belonging to the 177th Branch of Academy City's security maintenance organization 'Judgment', and roommate of Mikoto Misaka. She is a powerful ally of Mikoto, who bears the alias Railgun, and harbors affection for her.

Quotes

  • This is... this is my Judgment!
  • Mikoto-sama, I will always be by your side.
  • Now, to protect Sister Mikoto, I will go all out!

Trivia

  • Kuroko harbors strong romantic feelings for Mikoto Misaka.
  • Her teleportation ability is top-class even in Academy City.
  • Slightly shorter than Mikoto, but popular for her lovely appearance.
  • Her Judgment uniform has a special design.
  • Production of the TV anime's 4th season was announced in 2025.

Alternate names

Kuroko A Certain Judgment Member Kuroko of Judgment Branch 177

Tags

Judgment Esper Academy City Level 4 Roommate A Certain Scientific Railgun Mikoto Misaka Tokiwadai Middle School Judgment

Profile

Species
Human
Gender
Female
Birthday
October 1

Appearance

Overall appearance
Slim middle school girl around 158cm tall. Pinkish-brown hair styled in twin tails. An atmosphere exuding dignified elegance and liveliness, perceptible even over her uniform.
Height
Approximately 158cm
Eye color
Brown
Hair color
Blond
Distinguishing features
  • Twin tails
  • Tokiwadai Middle School uniform
  • Petite and slender
Iconic items
  • Judgment armband
  • Kuroko's uniform
  • Judgment equipment (gel agents, etc.)

Personality and abilities

Core personality
Devoted
Detailed personality
Holds strong loyalty and romantic feelings toward Mikoto, sincere and steadfast. Sometimes carries a unique air with humor, but strict about work. Spirited and cheerful, strict on herself and others, but kind-hearted and caring.
Keywords
  • Devoted
  • Steadfast
  • Brave
  • Unique
  • Roommate
  • Strong sense of justice
Motto
Will give full effort for the sake of others
Talents
  • Super high-speed movement
  • Teleportation
  • Powerful psychokinesis
  • Arrest techniques
Skills
  • Field response ability as Judgment
  • Operational skills
  • Information processing ability
Motivation
To protect Mikoto and continue maintaining peace in Academy City.
Habits
Uses unique suffixes like '~ryon♡'. Excessively affectionate toward Mikoto.
Favorite foods
Sweets, Snacks, Especially pudding
Hobbies
Monitoring Mikoto Misaka, Combat training, Support for Misaka electrical appliances

History

Backstory
Belonging to the 177th Branch of Academy City's security maintenance organization 'Judgment (Wind Discipline Committee)', she shares daily life as Mikoto's roommate while working to maintain peace in the city. Possessing abilities befitting the prestigious Tokiwadai Middle School where she was born and raised, she actively involves herself in various incidents.
Debut date
April 21, 2007
Work title
A Certain Scientific Railgun
Media type
Manga
Episode or chapter
Volume 1

Fantasy Hand (Level Upper) Incident

Significant event
Fantasy Hand (Level Upper) Incident
Description
Involved in a series of bombings around Mikoto, participated in the investigation as Judgment, contributing to uncovering the truth and arresting the culprit.

Sisters Arc

Significant event
Sisters Arc
Description
Supported Mikoto in the incident involving Mikoto's clones, the Sisters, providing rear support in multiple ways.

Daihaseisai Arc

Significant event
Daihaseisai Arc
Description
Caught up in the chaos of the sports festival, worried about Mikoto and others while rushing to resolve various incidents.

Astral Buddy Arc

Significant event
Astral Buddy Arc
Description
Became involved in internal evolution and factional conflicts through her encounter with the amnesiac ghost girl, Chiyo.

Relationships

Mikoto Misaka

Best friend

Supporting each other as roommates, overcoming numerous incidents together.

Kazari Uiharu

Teammate

Teammates in Judgment Branch 177, working together.

Ruiko Saten

Teammate

Kuroko's friend and trusted ally.

Judgment 177th Branch

Judgment 177th Branch: teammate

Media appearances

A Certain Scientific Railgun

Anime / Supporting

2009-2010 TV series

A Certain Scientific Railgun S

Anime / Supporting

2013 TV series

A Certain Scientific Railgun T

Anime / Supporting

2020-2021 TV series

A Certain Scientific Railgun

Manga / Supporting

2007-present serialization

A Certain Scientific Railgun

Game / Supporting

2011 PSP game

Voice cast and creators

Satomi Arai

Voice actor
Satomi Arai
Language
Japanese
Version or series
TV anime version

Satomi Arai

Voice actor
Satomi Arai
Language
Japanese
Version or series
Movies

Kazuma Kamachi

Creator name
Kazuma Kamachi
Role
Original author

Motoi Fuyukawa

Creator name
Motoi Fuyukawa
Role
Illustrator

Kiyotaka Hiyama

Creator name
Kiyotaka Hiyama
Role
Character designer

KADOKAWA

Creator name
KADOKAWA
Role
Publisher

Related goods

Kuroko Shirai Figure

Item name
Kuroko Shirai Figure
Category
Figure
Availability
Regular

Judgment Armband Replica

Item name
Judgment Armband Replica
Category
Accessory
Availability
Limited

Kuroko Shirai Acrylic Stand

Item name
Kuroko Shirai Acrylic Stand
Category
Accessory
Availability
Regular