Mortal Kombat X/Sub-Zero
Kuai Liang and his older brother, Bi-Han, served the Lin Kuei assassin clan faithfully until the first Mortal Kombat tournament. There Bi-Han, codename Sub-Zero, was killed by the demon Scorpion. Kuai Liang assumed the Sub-Zero name and went to Outworld to find his brother's killer. Meanwhile, the leadership of the Lin Kuei embarked on the Cyber Initiative, converting its members to cybernetic ninjas to increase their efficiency and remove their human imperfections. Kuai Liang was captured and converted. Eventually, Raiden and the defenders of Earthrealm restored his soul, and he joined their cause. He was later killed in the Outworld invasion, his soul claimed by the Netherrealm sorcerer Quan Chi. Sub-Zero served the demon realm during its subsequent war with Earthrealm. Returned to humanity by Raiden in the aftermath, Sub-Zero rebuilt the Lin Kuei--this time as a benevolent organization dedicated to the protection of Earthrealm.