The Grand Inquisitor

"The Jedi are dead, but there is another path. The dark side."

- The Inquisitor to Ezra Bridger The Inquisitor is the main antagonist of the first season of Star Wars Rebels. He serves as one of the Galactic Empire's Inquisitors, tasked by Darth Vader to hunt down the remaining Jedi Knights.

Star Wars Rebels: Spark of Rebellion
In the extended cut of the television pilot, The Inquisitor appeared during the opening of the film where he was being instructed by Darth Vader with a new task. Even though the Jedi Order has been crushed, the Emperor had foreseen a new threat; the Children of The Force. Darth Vader instructed him to hunt down this new enemy and either enlist them or destroy them.

The Inquistor appeared at the end, where Agent Kallus reports his findings of the Rebels and the Jedi Kanan Jarrus for which he was pleased to hear.

Star Wars Rebels
In the episode "Rise of the Old Masters", The Rebels attempted to rescue Jedi Master Luminara Unduli, only for Kanan and Ezra to discover her deceased body encased inside a coffin. Catching them off guard, The Inquisitor told Ezra and Kanan that Master Luminara died along with the Republic but her remains were used to lure the remaining Jedi to their end.

As the Inquisitor engaged Kanan in a lightsaber duel, he recognized his fighting skills from his teachings with Jedi Master Depa Billaba and began to mock him. He even gave Ezra a choice to join the Dark Side of the Force as the Jedi were no more and Kanan lacked the ways of the Jedi. Ezra refused the offer and both master and apprentice escaped from their near execution.

When the Rebels attempted to smuggle Tseebo off Lothal in "Empire Day", he led a TIE Fighter squadron to stop them from escaping. He piloted the Empire's new TIE Advanced and planted a tracking device on their ship moments before they jumped to hyperspace.

In "Gathering Forces", The Inquisitor and the Imperials followed the tracking beacon, which was planted on the haul of the Phantom to the abandoned Republic Base and where Kanan and Ezra lured them away from Tseebo, delivering him into safe hands.

The Inquisitor led a squadron of Stormtroopers down to the base and found Kanan and Ezra in connection with the Fyrnocks that inhabited the base. While the Stormtroopers took on the Fyrnocks, the Inquisitor engaged Kanan in a lightsaber duel for the second time. He quickly overpowered him and apprehended his lightsaber. Ezra tried to protect his master by standing in his way but the Inquisitor just forced him away and began to torment him with his fears of losing everyone he cared about and everything he hoped for, at the same time encouraging him to give into the Dark Side. Ezra's growing fear turned into hatred against him that he summoned an even larger Fyrnock to attack him. The Inquisitor managed to fight off the beast but Ezra and Kanan escaped him once again, which he knew Darth Vader would be furious to learn about.

In "Call to Action", The Inquisitor, along with Agent Kallus and Maketh Tua, were visited by Grand Moff Tarkin who had come to take over the hunt for the Rebels on Lothal. While holding a meeting in Kallus' office, Tarkin had the Inquisitor execute Commandant Aresko and Taskmaster Grint for their failures to capture the Rebels, which also served as a grim warning to Agent Kallus, Minister Tua, as well to the Inquisitor himself that failure would have merciless consequences from now on. On the night the Rebels made an attempt to hack into the Imperial communications tower, the Inquisitor was sent in and engaged Kanan in a brief lightsaber duel which ended with Kanan's arrest.

In "Fire Across the Galaxy", The Inquisitor engaged in a duel with both Kanan and Ezra in main engineering of an Imperial Star Destroyer. After successfully overpowering Ezra, he invoked the wrath of Kanan, who was able to use Ezra's lightsaber as well as his own to overcome The Inquisitor. Realizing that his end had come, The Inquisitor let himself fall into the explosion of the Star Destroyer's reactor, choosing death rather than face the punishment that awaited him for his failure.

Trivia

 * The Inquisitor shares some familiar characteristics to Darth Maul from Star Wars episode I: The Phantom Menace, such as his double-bladed lightsaber. However, his is contained inside a wheel.
 * Despite his appearance and role, the Inquisitor is not a Sith. He is instead what is known as a Dark Side Adept.
 * When Kanan and Ezra battle The Inquisitor for the last time, The fighting sequence is almost similar to the first Star Wars episode,The Phantom Menace. Where Qui Gon Jin and Obi Wan Kenobi fought Darth Maul.