Kuai Liang

Sub-Zero is an assassin of the the order of Lin Kuei, the Chinese predecessor of the concept of Ninja. Unlike his brother Bi Han, the previous Sub-Zero, Kuai Liang is honorable and after taking over the Lin Kuei, runs the clan as as close to a heroic organization as assassins can be.

Sub-Zero is a playable character in Injustice 2.