Waterway.

Waterway is the Energia wielded by Kirai.

Waterway is an Energia that can manipulate water in any sorts of ways; like freezing water, piercing water, boiling water, any type of water. Kirai's Energia is pretty easy to use since he's had it since age 13; and he's 24 currently.

Cause/Effect
Waterway can be a pretty dangerous Energia when it comes to fighting him. I'''t's confusing to think that Ryu beat him. But she has Elemental Control, so we're good.'''