ミサカ9982号
One of the many "Sisters" - clones of [[Misaka Mikoto]]. 9982, as her name implies, was the 9982nd of 20,000. She was also the first one with which the Railgun had contact, and received a Gekota pin as a "present" from her original, a feature that usually distinguishes her from the other identical clones.

[spoiler]As indicated by her number, this Sister was quite brutally murdered by [[Accelerator (toaru majutsu no index)|]] during the Level 6 Shift Project, right in front of a powerless Mikoto's eyes.[/spoiler]
misaka imouto 9982