Kinuho Wannai

Kinuho is a Level 3 esper and Kuroko's classmate who reside in the same dorms as Mitsuko and is a member of the swim club. Her ability is Hydro Hand (水流操作 (ハイドロハンド), Haidoro Hando, "Aquakinesis"), a form of aquakinesis which allows her to manipulate water. She is able to control up to 300 litres of water in up to four separate clumps within a range of 18 meters. Kinuho was once saved from some thugs by Mikoto and is thankful to Mikoto on what she did. She is often seen hanging around Mitsuko along with Maaya.

(Source: Wikipedia)