Ventress is a Zabrak from Dathomir's Nightsister clan of witches who is surrendered into slavery as an infant before being rescued and trained in the ways of the Force as a Jedi Padawan.

The death of her Jedi master causes Ventress to fall to the dark side of the Force and become the Sith Lord Count Dooku's informal apprentice and personal assassin.

She serves as a commander for the Confederacy of Independent Systems and fights the Jedi of the Galactic Republic during the Clone Wars until she is betrayed by Dooku.

Ventress returns to the Nightsisters and makes numerous failed attempts on Dooku's life, after which she turns to bounty hunting as an independent mercenary.

She forms an alliance, and later a relationship, with the Jedi Quinlan Vos and seemingly sacrifices herself to save him from Dooku, although she survives and encounters Clone Force 99 during the reign of the Galactic Empire.

The character also appears in tie-in Star Wars media such as books, comics, and video games, and has become a favorite among fans.

The name Juno Eclipse was later given to a character from the video game Star Wars: The Force Unleashed, with no relation to Ventress.

As the disciple of Count Dooku, she helps him with his plan to turn Jabba the Hutt against the Galactic Republic by kidnapping his son Rotta.

In season one, Ventress travels to the moon of Rugosa as Dooku's emissary to form an alliance between the planet Toydaria and the Separatists.

Ventress then frees Trade Federation Viceroy Nute Gunray from the custody of Luminara Unduli and Ahsoka, fighting the two Jedi before ultimately succeeding in her mission.

She turns to the Nightsisters of Dathomir for help, and they engineer Savage Opress to serve as Dooku's new apprentice in order to earn his trust, before ultimately killing him on Ventress' behalf.

Told by Talzin to find her own path, Ventress later helps Boba Fett's team of bounty hunters in a dangerous but profitable mission.

In the 2015 novel Dark Disciple, based on unfinished episodes from The Clone Wars, Ventress teams up with undercover Jedi Master Quinlan Vos in an "un-Jedi like" mission to kill Dooku.

Brad Rau, the supervising director of The Bad Batch said that the appearance would be faithful and not contradictory to the events of the book.

Her appearance in The Bad Batch showed viewers that although she was once a villain, she is now harnessing the light side of the force and is capable of compassion.

Darth Sidious later personally assigns Ventress to kill Anakin Skywalker, and Dooku presents the Dark Jedi with a new pair of lightsabers with curved hilts.

Though she initially gains the upper hand in their duel, Anakin calls upon his immense connection to the Force and brutally overpowers her, causing her to fall over the edge of a cliff.

In the ensuing battle with Republic forces, Ventress makes her first public appearance in the war (in the chronological timeline).

Ventress kills Mira in the battle and then engages Jedi Masters Sian Jeisel, K' Kruhk and Rhad Tarn all of whom she defeats singlehandedly.

In the Republic story "Blast Radius", Ventress and Durge again engage the Jedi taskforce in a facility on the planet Queyta.

Although the Separatists claim a victory, Ventress spares Obi-Wan's life under Dooku's orders, though she impales Fay in the chest with her lightsabers.

Obi-Wan and Alpha escape in the following story, "Hate & Fear", and the Jedi Master takes Ky Narec's lightsaber, making the animosity between him and Ventress deeply personal.

In "Dreadnoughts of Rendili", Ventress and fellow Dark Jedi Tol Skorr fight Obi-Wan and Quinlan Vos on Titavian IV.

She is also playable in the multiplayer mode for the Wii version of the sequel, Star Wars: The Force Unleashed II.