Theca

Theca was an Arkanian Jedi Master of the Jedi Order who lived during the Republic Era and was rumored to be well past two hundred years old. The Jedi sported white hair and maintained a good deal of energy for their age. In 22 BBY, Theca was part of an assault team sent to the planet Geonosis to rescue Jedi Knight Obi-Wan Kenobi, Padawan Anakin Skywalker, and Senator Padmé Amidala from the Petranaki Arena, where they were being held prisoner by the Geonosians.

Theca was transported to Geonosis in a shuttle with a detachment of Jedi Masters, Knights and Padawans led by Master Klefan Opus. Upon approach to the planet, Opus received their orders from the assault team's commander, Master Mace Windu. The detachment was sent by Windu to secure the perimeter of the arena and was successful, eliminating enemy guards and sonic cannons, while the rest of the assault team fought in the arena itself during the ensuing battle.

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