Hydro

Hydro was a warrior from Earthrealm who was a member of the Lin Kuei clan. He appears in the  Mortal Kombat: Blood & Thunder comic books, and Mortal Kombat: Legacy web series.

Comics
Hydro was a close friend of Sub-Zero and a fellow Lin Kuei. He journeyed with Sub-Zero to combat the forces of Outworld. Hydro has the ability to control water and even blasted strong waves of water that were so freezing cold that they could actually freeze the opponent upon contact.

After Scorpion and Hydro fought in Outworld, Hydro was killed, as part of the undead wraith's promise of killing all of Sub-Zero's friends and family before killing Sub-Zero himself.

Mortal Kombat: Legacy
In Mortal Kombat: Legacy, Hydro is portrayed as an earlier version of the cybernetic ninja program, unit LK1V1, and is pitted against Cyrax and Sektor to demonstrate their superior abilities. This version of Hydro displays similar skills to other Lin Kuei cyborg, such as conducting electricity around his arms and fists to increase the damage of his attacks. Hydro showed to have the upper hand against both Cyrax and Sektor at the beginning, but ultimately, Hydro was bested by both cyborgs due to Sektor holding Hydro's arm from behind and allowing Cyrax to have a clean first shot then Sektor joining in, allowing Cyrax to perform a Fatality.

Trivia

 * In Mortal Kombat: Legacy, the age of Hydro when he was transformed by the Cyber ​​Initiative was 50, thus being the oldest cyber ninja.
 * In Mortal Kombat: Legacy, Hydro was one of the first cyber ninjas.