One of the earliest members of the Lost Twenty was the Umbaran Jedi Master Phanius, who eventually became Darth Ruin, the first Dark Lord of the Sith in the New Sith Empire. Over time more would leave; twelve by 990 BBY, and ending with the twentieth member, Master Dooku. Leaving the Order in 32 BBY because of a growing disenchantment with the Galactic Senate, Dooku would fall under the tutelage of Darth Sidious and become the next Dark Lord of the Sith, Darth Tyranus. Following the dissolution of the Order in 19 BBY, the fallen Jedi Knight Anakin Skywalker considered himself to be the twenty-first member of this group.
During the Clone Wars, Jedi Knight Bardan Jusik, disenchanted with the Republic and the Jedi's treatment of their clone soldiers and believing it to not be the Jedi way, also left the Order before Skywalker, though he was not counted as a member of the Lost Twenty as he was not a Master.
Along with the most venerable Masters, the Lost were remembered in the form of bronzium busts in the Jedi Archives, a reminder of the Jedi's greatest failures—though the Jedi did not fault the individuals for leaving, regarding the statues as a reminder that the Jedi were not perfect and that sometimes they might fail to provide what a Jedi might seek out of life. Each bust's pedestal listed the great deeds of the Master it commemorated, but not the reason he or she left the Order.
Sidious later jotted down notes about the Twenty in the Book of Sith under Sorzus Syn's diary section on the First Great Schism, where he mentioned that the Lost Twenty were examples of Jedi who left the Order yet did not become combatants, while expressing his disgust at their philosophies being retained.
Behind the scenesEdit
According to Pablo Helman on the Star Wars: Episode II Attack of the Clones DVD commentary, during the scene where Obi-Wan Kenobi speaks to Jocasta Nu, the room includes busts of himself, George Lucas, Rob Coleman, and John Knoll. It is not known whether any of these four were meant to represent any of the Lost Twenty.
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- Darth Plagueis (Mentioned only)
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- Star Wars Episode II: Attack of the Clones novel (Mentioned only)
- Star Wars: Episode II Attack of the Clones (Mentioned only) (Deleted scene)
- Star Wars Episode II: Attack of the Clones junior novel (Mentioned only)
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- Star Wars Episode III: Revenge of the Sith video game
- Star Wars Episode III: Revenge of the Sith novel (Mentioned only)
- Star Wars Episode III: Revenge of the Sith junior novel (Mentioned only)
- Star Wars: Purge: Seconds to Die (Busts)
- Dark Lord: The Rise of Darth Vader (Mentioned only)
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- Star Wars: Battlefront II (Busts)
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- Star Wars: Attack of the Clones The Visual Dictionary
- Coruscant and the Core Worlds
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- Vader: The Ultimate Guide
- Dressing a Galaxy: The Costumes of Star Wars
- The New Essential Chronology
- "Heritage of the Sith"—Star Wars Insider 88
- Jedi vs. Sith: The Essential Guide to the Force
- Star Wars: The Clone Wars: The Visual Guide
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