Summary
- The Grand Inquisitor, a corrupted Jedi, was seduced by the Sith in the wake of Order 66 after being disenfranchised by the Jedi Order.
- Ahsoka Tano's departure from the Jedi Order greatly impacted the Grand Inquisitor, leading him to eventually embrace the dark side.
- The Grand Inquisitor lost faith in the Jedi Order after the Jedi Temple bombing, ultimately leading him to serve Palpatine and become the leader of the Inquisitorius.
Grand Inquisitor was once a disenfranchised member of the Jedi Order seduced into serving the Sith following the Jedi Purge. To that end, the established canon has confirmed that Ahsoka Tano played a role in the Grand Inquisitor's turn to the dark side.
Having received further confirmation in the new Star Wars: Dawn of Rebellion The Visual Guide by Pablo Hidalgo and Emily Shkoukani along with past references, Ahsoka's final days with the Jedi Order greatly impacted the Grand Inquisitor when he was still a Jedi Temple Guard. However, this was merely the final straw as the Grand Inquisitor had already grown quite angered with the Jedi Order throughout his career. As such, he became a prime target for Palpatine during his search for future Inquisitors just before the events of Order 66. Here's the Grand Inquisitor's Jedi history and corruption explained.
The Lust For Forbidden Knowledge Led The Grand Inquisitor Down A Dark Path
Jocasta Nu Denied Him Archive Access As A Jedi
As was revealed in 2017's Darth Vader series during the Grand Inquisitor's first days serving the Empire, it was confirmed that Palpatine had promised the Pau'an Jedi full access to the Jedi Archives and its darker secrets, something he'd been denied by the Jedi's Chief Librarian Jocasta Nu before his corruption. As such, the Grand Inquisitor gradually became embittered with the Jedi Order for "repressing knowledge". However, this was Jocasta Nu's right, having correctly sensed that the future Grand Inquisitor was not suited to read certain knowledge contained within the Archives deemed dangerous such as its lore on the dark side.
Nevertheless, the future Grand Inquisitor remained a dutiful Jedi Temple Guard despite his anger and frustrations. That said, these resentments opened him up to be seduced and eventually corrupted to the dark side as Palpatine grew closer to enacting his master plan to end the Jedi and begin his new Empire. As a result, it's since been confirmed in recent years that Ahsoka leaving the Jedi Order led the Grand Inquisitor to embrace the dark side following Order 66 as seen in Revenge of the Sith.
The Grand Inquisitor Fell Before Order 66 (Thanks To Ahsoka)
Faith Was Lost After The Jedi Temple Bombing
Near the end of the Clone Wars, the Jedi Council wrongly accused Ahsoka Tano of bombing the Jedi Temple. As such, Tano was forced to escape custody and clear her name with the reveal that Barris Offee was the true culprit, having embraced the dark side after becoming disenfranchised with the Jedi Order. Such was the case for many other Jedi who eventually became Darth Vader's Imperial Inquisitors.
As one of the temple guards who escorted both Ahsoka and Barris to their tribunals, the future Grand Inquisitor was very close to the major Star Wars crisis, and it's now been confirmed that this was the event that led him to lose faith in the Jedi Order completely. He was more than ready to serve Palpatine in the wake of Order 66, especially after the Emperor promised him everything the Jedi had denied. All in all, it's tragically no surprise that he jumped at the chance to embrace the dark side and lead the Inquisitorius going forward.