Kuai Liang (Chinese: 奎良)[2], once known as Sub-Zero (Chinese: 绝对零度; Absolute Zero)[3], Grandmaster (of the Lin Kuei), Tundra, and briefly as the cyborg LK-52O is a character in the Mortal Kombat fighting game series. Kuai Liang made his playable debut in Mortal Kombat II as a Lin Kuei assassin and the younger brother of Bi-Han, who was the original Sub-Zero in the original Mortal Kombat arcade game. He takes the mantle of Sub-Zero in his later appearances in the series but reappears under his original alias of Tundra in Mortal Kombat (2011) before again going under the mantle of Sub-Zero. Kuai Liang would become a frequent supporting character after his debut. He would later end the long standing rivalry between the Lin Kuei and Shirai Ryu after becoming Grandmaster and making peace with his rival Hanzo Hasashi in the alternate timeline. A new version of Kuai Liang returns in Mortal Kombat 1 as a playable character, taking over the mantle of Scorpion (Chinese: 蝎; Japanese: 蠍), serving in a supporting role the game's Story Mode. He later serves as one of the protagonists of the Khaos Reigns Story Mode expansion.