|Chronological and political information|
- "It'll take more than the likes of you to stop me."
- ―Yansu Grjak
- "We will not repeat the mistakes of Shaman Yansu Grjak, who too eagerly sold the services of her clan to Separatist buyers and then could not protect her sisters from the Jedi counterattack."
- ―Mother Talzin
Yansu was a shaman of the Nightsisters who lived during the waning days of the Galactic Republic. She and her fellow sister Sai Sircu led an army of their lightsaber wielding order during the war between the Republic and the Confederacy of Independent Systems. At that time, they formed an alliance with Count Dooku in order to bring about the downfall of the Jedi Order.
Later she was sent to Rodia, where she was chased down by a pair of Jedi, and despite her powers, she was killed by the pair, weakened by crystals being thrown at her by the Jedi in whom were using the force to do so.
- Star Wars: The Clone Wars: Jedi Alliance (First appearance) (First identified as Yansu Grjak)
- "Everything You Always Wanted to Know about the Nightsisters but Were Afraid to Ask"—Star Wars Insider 122
- Book of Sith: Secrets from the Dark Side