Seventh Sister

The Seventh Sister is a Mirialan Inquisitor and the secondary antagonist in the second season of Star Wars Rebels, voiced by Sarah Michelle Gellar.

Quick, agile, and deadly, the Seventh Sister is strong with the dark side and one of the Empire’s elite Jedi hunters, dispatched by Darth Vader to find Ahsoka Tano and her rebel friends. She often employs the use of ID9 Seeker Droids on her missions, and carries the same model double-bladed Lightsaber wielded by the Grand Inquisitor.

Personality
The Seventh Sister is tactically minded, and unlike her fellow Inquisitors she considers killing her targets isn't always the best approach. Instead of killing on sight, she prefers to play cat and mouse with her targets before taking her missions more seriously, as shown in her first encounter with Ezra and Sabine. She simply walked after them while Ezra and Sabine tried to ran from her. When it comes to torturous interrogations, she displays no mercy and will use any methods necessary to get what she wants out of a person, even threatening to dismemberment her captives.

Powers and Abilities
As an Inquisitor, the Seventh Sister is skilled in the use of her Lightsaber and in the Force. She is fond of employing ID9 Seeker Droids to track and attack her targets. Though she is shorter and less bulky than the Fifth Brother, she displays great agility and athletic ability.

She appears to have an ability to probe another's mind to glean information although a Force-sensitive can resist this probing but still feel pain. She possesses great Telekinesis, as she tries to prevent her targets from escaping on the Phantom whilst trying to close hangar doors but ultimately couldn't perform both simultaneously.

Role in the Series
Upon discovering Vader's former apprentice was still alive, he dispatched the Seventh Sister to hunt her down. When members of the Rebellion were sent to salvage medical supplies from an abandoned medical station, she crossed paths with Ezra Bridger and Sabine Wren, and was unexpectedly joined by the Fifth Brother. She engaged Ezra in an unfair lightsaber duel and easily overpowered him. Although Sabine escaped, she managed to capture Ezra and prevented her fellow Inquisitor from killing him, as she needed him for interrogation. After sending the Fifth Brother to capture Sabine, the Seventh Sister took Ezra back to the command center for interrogation in an attempt to get him to reveal the location of the other rebels, most notably Ahsoka Tano.

Like the Grand Inquisitor before her, the Seventh Sister made efforts to convince Ezra in joining the dark side, noting that his mentor had never achieved the rank of Jedi Knight and was thus ill-qualified to instruct a Padawan. Ezra then cited Kanan's defeat of the Grand Inquisitor, something that the Seventh Sister admitted had been unexpected but presented the other Inquisitors with "new opportunities." However, Ezra resisted her efforts to get information out of him, even when the Fifth Brother arrived with a captured Sabine. Apparently, the two Inquisitors were outwitted by Zeb Orrelios, and helped Ezra and Sabine escape her clutches. the Seventh Sister tried to prevent them from escaping but, as powerful as she was, she was unable to mantain her Force grip on the Phantom alone, resulting both Inquisitors to lose the Rebels.

Trivia

 * Sarah Michelle Gellar, who provides the voice of the Seventh Sister, didn't get to see her design before she went in to provide her voice.
 * Ironically Sarah Michelle Gellar's husband, Freddie Prinze, Jr. provides the voice of Kanan Jarrus, one of the main protagonists.
 * Like the Grand Inquisitor, she wields a double-bladed Lightsaber that can rotate its blades. The only difference is the disc design has a unique texture and curved points on the outer ring.