Profile:
A Level 4, 2nd year transfer student of Tokiwadai Middle School. She also owns a pet snake named Ekaterina. She originally appears in the eighth novel and makes her first animated appearance in the To Aru Kagaku no Railgun anime, though appears much later on in the manga.

As Kuroko's rival, she is confident, boastful, and desires to become a Level 5. Although she if often boastful about her abilities, she usually finds herself the victim of several attacks. Like all Tokidawai students, she lives in one of the school's dormitories albeit her dormitory is located within the School Garden District.

Ability:
Her ability is called "Aero Hand" (空力使い Kūriki Tsukai, Aerodynamic Touch) which with any object she touches, a powerful gust of wind will take form, propelling it like a missile.
She is able to use multiple outputs to launch heavier objects.

Source:Wikipedia