The Moroi are a species of vampires from the Mortal Kombat universe. Native to the realm of Vaeternus, they appear human but with elongated fangs and bat-like wings upon their backs. They were not an evil race but neutral as they required the blood of living beings in order to survive. The race were known to be incredibly old as well as have very detailed histories which were chronicled by their Elders. These archives were so detailed that some of those archives contains prophecies that encompassed the realm of Edenia in relation to the fabled Pyramid of Argus and even had knowledge on the Saurians of Zaterra.
Like so many realms, Vaeternus was conquered by Shao Kahn and merged with Outworld, and so the Moroi found themselves enslaved. However, during the events of Mortal Kombat: Deadly Alliance, one of the Moroi - Nitara - was able to reverse the merger and separate Vaeternus from Outworld, restoring her people's independence.
- Vampirism - The Moroi are suspected to be the root of all Earthrealm myths and legends regarding vampires. As the stories describe, they feed on the blood of living beings to survive.
- Flight - Though Nitara is the only Moroi to be seen in any MK title, it is believed that the bat-like wings upon her back are a common trait among her people.
- Magic - The Moroi have a natural inclination towards magic, much like Outworlders and Edenians do. One notable magical ability they possess is conjuring portals to other realms using mystical crystals, allowing them to enter different worlds for short periods so that they can hunt.
- Weakness to Sunlight - The vampires of old Earth legend have a number of weaknesses, but only one of them is known to be true for the Moroi. Earthrealm's sun is harmful to Moroi and so they do not hunt there as regularly as other worlds.