Zalem

Zalem was the Clan Mother of one of the many Nightsister clans on the planet Dathomir. She succeeded in rallying the warring covens, styling herself as the Queen of the Nightsisters. She conceived a daughter, Ros Lai, with an enslaved Jedi Knight, and used her mate's powers to augment her own connection to the dark side of the Force. When she became strong enough to dispense with him, Zalem murdered her husband and started to rear her daughter as a witch. The child, however, appeared to be deformed, which prompted Zalem to reject her. At some point, the self-styled queen discovered the Star Chamber on Dathomir, and she sought to unlock its secrets and gain access to the Infinity Gate. The effect of Zalem's meddling with that ancient technology resulted in the destruction of the planet Ova. That incident attracted the attention of the Jedi High Council, who sent the Jedi Knight Quinlan Vos to Dathomir. While Vos was unable to stop Queen Zalem by himself, Ros Lai wished to avenge the death of her father, and she ended up killing her mother.

Text and facts from the “Zalem/Legends” article on Wookieepedia, licensed under CC BY-SA 3.0. Modified for this site.