To Aru Kagaku no Railgun - Vol. 8 Ch. 47 - Encounter

[MangaDex]

 

[DarklordVor]

Hmm Misaki knows Touma's family name without him introducing himself and there's no way Misaka would call him anything but "idiot". So does she have a telepathic power that reads mind or something? But even then, Touma should cancel her skill right.