Onaga, also known as The Dragon King, is a major antagonist in the Mortal Kombat franchise. He is the first ruler of Outworld that was betrayed and killed by his advisor Shao Kahn, resulting in Kahn usurping his empire and deciding to expand it across all realms. He would later be resurrected, seeking revenge upon Kahn and to conquer realms for himself.
He is voiced by Nigel Casey in the original timeline.