Smoke

Smoke appeared in 1993 video game called Mortal Kombat II. Tomas Vrbada, better known as Smoke, also later known as Enenra, is a ninja assassin who was turned from a human into a cyborg in the original timeline of the Mortal Kombat series. He made his debut in Mortal Kombat II as an unplayable secret character in human form, and first became playable in Mortal Kombat 3 in cyborg form. He appears in the franchise's reboot, now retaining his human form in canon for the first time in almost two decades.

Smoke debuted in Mortal Kombat II as a hidden character to fight against, along with Noob Saibot and Jade. He was often spotted in the Living Forest stage in which he (along with Jade) peeked out of the trees. Like Reptile when he made his first appearance, he was simply a palette-swap of Scorpion with puffs of smoke surrounding him, but would move extremely fast. He would appear randomly before matches, offering clues that would enable the player to fight him, as Reptile had in the original Mortal Kombat.

Smoke would not have his own story line until he was featured in Mortal Kombat 3, where he was once again a hidden character, but accessible to players with the use of a code. In this appearance, he would be a tortured human soul trapped in the body of a cyborg. His most defining feature is the fact that he constantly emits smoke. This, combined with his power to teleport and turn invisible, once made him one of the Lin Kuei's top assassins.

In Mortal Kombat (2011), it's revealed that he has long, flowing silver hair that covers his face (although it is shown being blown back in renders and artwork).