Elder Sister

"Elder Sister" is one of the minor antagonists for Toaru Kagaku no Railgun. She later appears as a participant in the Special Training Course initiated by Academy City for selected students. Her real name was never revealed.

"Elder Sister" is a high school student from an unmentioned school. She leads a Skill-Out gang, handling a small group of people who call her as "Elder Sister (Anego)", thus the term used to refer to her. She displays the ability "Flux Coat", which allows her to manipulate the viscosity of asphalt.

She had an encounter with Misaka Mikoto in Episode 08 which results in the defeat of the Skill-Out leader, and with Saten Ruiko later in Episode 14, where she is bravely confronted by the Level 0 in her opinions regarding the training course.