Younger Sub-Zero (Kuai Liang, Sub-Zero without mask, Sub-Zero 2). In the direct sequel Mortal Kombat II, Bi-Han's place is taken by his brother Kuai Liang, who was originally known by his codename Tundra prior to assuming his elder brother's codename...

Younger Sub-Zero (Kuai Liang, Sub-Zero without mask, Sub-Zero 2). In the direct sequel Mortal Kombat II, Bi-Han's place is taken by his brother Kuai Liang, who was originally known by his codename Tundra prior to assuming his elder brother's codename to honor him. Upon his brother's death in the first tournament and the survival of Shang Tsung, Kuai Liang is sent by the Lin Kuei to complete his brother's unfinished task. In doing so, Scorpion eventually discovers that Liang is not the Sub-Zero he previously held accountable. In return for taking Bi Han's life, Scorpion vows to forever protect Liang, which becomes a deciding factor in the sequel. In Mortal Kombat 3, the younger Sub-Zero escapes from the Lin Kuei who wanted to transform their warriors into cyborgs. They program three cyborg assassins to hunt and terminate Sub-Zero (one of which being his old friend, Smoke, who failed to escape), who by this time had received a vision from Raiden and agreed to join the rebellion against a new threat.