Rajine

Rajine was a countess and Jedi who lived during the final centuries of the Galactic Republic. Additionally, she was an Energy Vampire and was capable of draining an individual's life-force. Eventually, the Jedi Knight Samuro recognized the threat that Rajine posed and imprisoned her in a city on a remote planet. After Samuro died while erecting a Force barrier over the world, rendering Rajine unable to leave the city, she took Samuro's protocol droid, Z-18, for herself.

Over a span of hundreds of years, Rajine used her ability of draining her victims' life-forces to turn them into mindless zombies under her service. During the Clone Wars, Jedi Master Mace Windu visited Rajine's city in search of the Alpha-2 Squad of clone troopers, which had gone missing there. When Windu entered the city, she began to slowly drain the Jedi's life-force, and imprisoned him. However, Z-18 freed Windu and gave him Samuro's holocron. Windu confronted Rajine and used the holocron to recite an incantation that freed the life-forces of the zombies under the Countess's control. The zombies turned against Rajine, killing her and ending her threat to the Jedi.

Text and facts from the “Rajine” article on Wookieepedia, licensed under CC BY-SA 3.0. Modified for this site.