- "Dark or light is not a feeling, but a choice."
- ―Jai Maruk to Whie Malreaux
Jai Maruk was a male Human native from the planet Druckenwell, and was nicknamed "the Hawk-bat." He was taken to the Jedi Temple on Coruscant at some point in his early years for Jedi training, and had attained the rank of Jedi Master by the time the Clone Wars occurred.
After returning from a costly mission on Vjun, where he lost a lightsaber duel against the Separatist-aligned Dark Jedi Asajj Ventress, Maruk was allowed to return to Coruscant by Count Dooku in order to lure Grand Master Yoda into a trap.
While eating his meal in the dining hall of the Jedi Temple, Maruk expressed his feelings about how one certain youngling, Tallisibeth Enwandung-Esterhazy, should be sent to the Agricultural Corps because of her apparent lack of the Force. Yoda made a bet with Maruk, that if Esterhazy were to win the fighting competition, he would have to take her as his Padawan learner. After watching Enwandung-Esterhazy defeat all other competition, Maruk hesitantly took her as his Padawan.
On a secret return mission to Vjun to confront Count Dooku, Master Maruk, Yoda, Master Maks Leem, Enwandung-Esterhazy, and Whie Malreaux were attacked by Ventress on Phindar. In a hard-fought rematch which nearly caused Maruk to turn to the dark side of the Force, Maruk was fatally slashed on the abdomen by Ventress. His Padawan clambered to his side and begged him not to leave her and, with his last breath, Maruk promised that he never would.