““Also…the way he moves in battle is rather unique, not by running, but it seems like he glides on the floor.””

“…?”

At this moment, Tatemiya couldn’t think anymore. It was true that he hadn’t heard anything when he had been approached, and now that Orsola mentioned it, that seemed to be the case. No matter what, the speed at which Acqua of the Back moved, except for the moment he changed directions, made it looked like he was vanishing.

““Seems like he uses a water movement spell. The reason why horse carriages can slide on ice is because of a thin layer of water between the carriage wheels and the ice, right? ””

[...]

At this moment, Acqua’s body was gliding as if he was skating on ice.

Toaru Majutsu no Index vol.16