Eighth Brother

The Eighth Brother is a minor antagonist in the Disney XD animated series Star Wars Rebels, and one of the secondary antagonists in "Twilight of the Apprentice". He was a Terrelian Inquisitor tasked by Darth Vader to hunt down the Emperor's former apprentice Darth Maul.

Biography
The Eighth Brother was from a race of near-human species Terrelian Jango Jumper from the planet Terrelia. Once a Jedi Knight, the Eighth Brother fell to the dark side and became one of Darth Vader's Inquisitors.

Star War Rebels
Sometime after the Inquisition was created, the Eighth Brother was dispatched to Malachor by Darth Vader to hunt down Darth Maul and retrieve the Sith Holocron from the Sith Temple there. He first appears when he ambushes Kanan, Ahsoka and Ezra, separating the latter from his two mentors. Kanan and Ahsoka pursue and eventually capture him. They then try to get some information out of him, but with little success. When a beam of energy comes out of the Temple, the Eighth Brother takes advantage of the Jedi's distraction to activate a signal. The Fifth Brother and Seventh Sister arrive and free him. Just when the Inquisitors are on the verge of victory, Ezra comes out of the Temple with Maul, who drives the trio off. Later, they learn from one of the Sister's probes that Maul found the Holocron and that Ezra has it. The Inquisitors battle Maul and the Jedi again, but they prove to be too powerful. After his lightsaber gets damaged and his comrades get killed by Maul, the Eighth Brother attempts to flee, but his lightsaber malfunctions and he plummets to his demise.