Ther are in fact two Sub Zeros: older and younger.Both are blue assassins not ninjas, Since Lin Kuei are chinese despites being called ninjas in sevral Mk games. That decend from cryomancers, an outword race possesing to generate and control the powers of ice, althoght both of them were born in earthrealm. The younger one bears a scar concpecious scar on his right eye, however as for deception the scar has faded away. The elder Sub Zero apperd in the first game and then after being killed by scorpion, his younger brother took his place in all the games, His elder brother later became the undead neatherrealm wraith, Noob Saibiot.