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misaka_mikoto seifuku to_aru_kagaku_no_railgun to_aru_majutsu_no_index

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She looks like that girl from Toaru Majutsu no Index.
Well she is Mikoto Misaka from To Aru. And she's one of the 3 main characters of the show, heck she even gets a spin-off called "To Aru Kagaku no Railgun".