Aoki

Aoki is a minor character in Toaru Kagaku no Railgun. She is a student in Academy City and is an esper of unknown level whose power involves the summoning of earth pillars.

Daihasei Festival Arc
During the Daihaseisai, she is seen competing in a bread-snatching race. Despite being shorter than her opponents, she uses her ability to boost herself up and easily snatch her dangling bread.

Ability

 * Summoning of earth pillars: Her ability isn't named or shown in detail, but it appears to involve creating earth pillars to boost herself up.