Garth Ezzar received his training from a Dark Jedi female, who served as his mentor.
Ezzar's initial encounter with her occurred on a colony planet situated within the Rim Worlds, where he existed as a pariah. Recognizing his latent abilities within the Dark side of the Force, she commenced his instruction in harnessing its power. Collaboratively, they embarked on a spree of unlawful activities, leveraging their Force abilities to facilitate their criminal endeavors. Nevertheless, as the Jedi initiated an inquiry, she betrayed Ezzar, intending to eliminate him and subsequently attribute the responsibility for their transgressions to him. This act of treachery ignited Ezzar's fury, leading him to slay her and strategically position her corpse in a manner that would shift the culpability onto her.