Ky Narec was a male Human Jedi Knight who lived during the last decades of the Galactic Republic and trained Asajj Ventress before being shot in the back by a Weequay raider and killed. His death paved the way for Ventress's fall to the dark side and her becoming Count Dooku's personal assassin.
- "You are strong with the Force, little one."
- ―Ky Narec
Narec's ship crashed on the barbaric planet Rattatak approximately a decade before the Clone Wars. There, Narec was immediately attacked by the locals. He fought the raiders and then found a slave Dathomirian girl named Asajj Ventress, and after watching her Force push a raider away, found her to be strong in the Force and taught her the Jedi arts.
Years later, as Ventress grew older, she and Narec fought against the Rattataki warlord Osika Kirske and eventually became heroes of Rattatak. However, before Narec had the chance to finish Ventress' Jedi training, he was shot in the back by a Weequay raider, hired by Kirske. Kirske had formed a temporary truce with the other warlords of Rattatak in a unanimous attempt to eliminate both Ventress and Ky Narec.
Enraged by Narec's death, Ventress turned to the dark side and later joined the Confederacy of Independent Systems to fight the Jedi, whom she thought of as having abandoned Narec, at the behest of Darth Tyranus.
In memory of her former master, Asajj tattooed her hairless head with twelve marks, one for each of the twelve warlords she had killed after swearing their deaths.
Narec's lightsaber was kept in Ventress' palace, to remind her of him. Obi-Wan Kenobi used it in conjunction with his own to battle against Ventress. Ventress was very angry that her enemy was using her master's lightsaber. As Kenobi fled Rattatak with ARC trooper Alpha, he told Asajj that fighting would not bring her master back.
Sometime after these events, when Dooku's assassination attempt on her failed, Ventress fled to the planet Dathomir, where she received treatment from Mother Talzin and her clan of Nightsisters. During this treatment, Ventress had memory flashbacks of how she had met Narec, her training with him, and ultimately his death. Later, Ventress, Naa'leth, and Karis attacked Count Dooku and nearly killed him, but he proved too powerful and he used Force lightning and forced them all to the cliff below. They all survived. The reason for this attack was to get Ventress the revenge she longed for.
- Jedi: Mace Windu (First mentioned)
- The Cestus Deception (Mentioned only)
- Republic 60: Hate and Fear (First appearance) (Appears in flashback(s))
- Yoda: Dark Rendezvous (Indirect mention only)
- Star Wars: Republic: Dreadnaughts of Rendili (Mentioned only)
- Star Wars: The Clone Wars novelization (Mentioned only)
- Star Wars: The Clone Wars: Lightsaber Duels (Indirect mention only)
- Star Wars: The Clone Wars – "Nightsisters" (Appears in flashback(s))
- Boba Fett: Pursuit (Mentioned only)
- Labyrinth of Evil (Indirect mention only)
- The Life and Legend of Obi-Wan Kenobi (Mentioned only)
- The Official Star Wars Fact File 116 (VEN1, Asajj Ventress)
- Star Wars: Revenge of the Sith Scrapbook
- Star Wars: The Ultimate Visual Guide
- The New Essential Chronology
- Star Wars: The Clone Wars: The Visual Guide
- The Complete Star Wars Encyclopedia
- The Clone Wars Campaign Guide
- The Essential Atlas
- "Everything You Always Wanted to Know about the Nightsisters but Were Afraid to Ask"—Star Wars Insider 122
- Star Wars: The Clone Wars Magazine 5
- Star Wars: The Clone Wars The Complete Season Three
- "Ask Lobot"—Star Wars Insider 129
- Book of Sith: Secrets from the Dark Side
- Star Wars: The Ultimate Visual Guide: Updated and Expanded
- Star Wars: The Clone Wars: What Is a Sith Warrior?
- Star Wars: The Clone Wars: Who Are the Jedi? (Indirect mention only)
- Star Wars: Force Collection (Card: Asajj Ventress) (Indirect mention only)
- "Everything You Always Wanted to Know about the Nightsisters but Were Afraid to Ask"—Star Wars Insider Special Edition 2014 (Reprint from Star Wars Insider 122)
- The Official Star Wars Fact File Part 6 (22 BBY 77, Conflict Spreads) (Indirect mention only)