Zero

Zero, previously known as Shad-Rah Varcanella was a Jedi Master active prior to the Clone Wars who at one point took on F as his apprentice. He had roots on the planet Keelia and was acquainted with the explorer Valco. He died during the the First Battle of Geonosis in 22 BBY. He was at some point resurrected and began working for the Galactic Empire under the name Zero. When the Empire intercepted the refugee ship F was on, she surrendered and was brought to Shad-Rah. The two dueled, and although Zero cut off most of her limbs, F used a capsule of carbonite to freeze him. He had white hair, red eyes, and light skin. He wore white and gray clothing.

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