Satori Kobayashi

Kobayashi Satori is a minor character in Toaru Kagaku no Railgun. She is a third-year student in Tokiwadai Middle School and is a Level 3 esper whose power involves telepathy. She is a member of Shokuhou Misaki's Clique, and is a leader of sorts among her fellow clique members, second only to Hokaze Junko.

(Source: Toaru Majutsu no Index Wiki)