Hydro Hand (水流操作 (ハイドロハンド) Suiryū Sōsa (Haidoro Hando)?, lit. "Water Current Manipulation") is a lineage of psychic powers involving the manipulation of the flow of water. A limited derivation of Telekinesis. Regarding the naming, it probably belongs to some broad category attached by Academy City. Users include the Level 3 Wannai Kinuho. Incidentally, it seems that Hydro Hand powers are common in the Tokiwadai Middle School's swimming club.