Height 152 cm (5'0") Classification Esper School Tokiwadai Middle School Affiliation Judgment Esper Power Teleport Power Level 4 Kuroko is [Mikoto](/character/13701/)'s kouhai in Tokiwadai Middle School and a protagonist in Toaru Kagaku no Railgun, as well as a supporting character in Toaru Majutsu no Index. A Level 4 Esper, she is a member of Judgment, a special public committee group whose duty is to maintain peace and order in Academy City. She has an unhealthy obsession with Mikoto, whom she calls "Onee-sama" (big sister), and is on the constant lookout for a chance to get physically intimate with her (and getting called a pervert in the process). Her power is instant teleportation, which allows her to teleport herself and anything she touches as long it weighs under around 130-137 kilograms to anywhere in a radius of around 81-85 meters.