Esok was a Humanoid male who was the leader of a Mandalorian clan that came to Dantooine after the Jedi Civil War, trying to make a living. He and his men joined up with a group of veterans under the leadership of Azkul.
- "And if I take that helmet from you, I guess that makes me 'Mandalore.' I always wanted to be called that."
- ―Esok after Mandalore gives his orders
When Meetra Surik guided Mandalore the Preserver to Azkul's encampment on Dantooine, just outside of the old ruins containing the Star Map, Esok refused to follow his summons to Dxun, where the Mandalorians were regrouping. Instead, he tried to claim his helmet in an attempt to declare himself Mandalore. However, the new Mandalore proved to be too much for him, and he was killed in the fight. After the display, Esok's warriors agreed to follow Mandalore.
- Star Wars: Knights of the Old Republic II: The Sith Lords (First appearance)