A character from the anime/manga series To Aru Kagaku No Railgun and related series To Aru Majutsu No Index. She is the roommate of the main character Misaka Mikoto, much to the latter's disapproval. Kuroko is a Level 4 esper with the power to instantly teleport herself or items in her possession. She spends most of her time with Mikoto, playing or investigating mysteries, when not looking to seduce her. She maintains a close, albeit overprotective relationship with her childhood friend Uiharu Kazari. Uiharu and Kuroko are members of the Academy City Judgment force which fights petty criminals and occasionally city-wide threats.
Seeks the acknowledgement, attention and love of her roommate. She becomes abysmally dejected when she thinks she has become a mere nuisance to Mikoto and company, under the impression Mikoto would rather willingly spend her time with others. She ultimately earned Mikoto's pity and unconditional friendship.
She is not above resorting to drugs, violence or stripping down to her birthday suit in her comical attempts to seduce Mikoto. Many of these attempts result in Kuroko receiving some kind of exaggerated physical injury.