Depa Billaba was a female Chalactan Jedi.
When Depa moved to a different planet with her parents, they were killed by space pirates. However, Mace Windu saved her and her sister, Sar Labooda. Windu and Billaba became friends and soon Windu taught her the Lightsaber combat form known as Vaapad. Soon she became part of the High Council. However, during the battle of Geonosis, her sister was killed. Billaba became a General afterwards. However, during the battle of Haruun Kaal, which was Mace Windu's homeworld. The warlord Kar Vastor helped her. However, Billaba fell to the Dark Side because of the stress of the battle. She fed off the fear of the planet as she battled Mace Windu, who had come to help her. However, she was knocked unconscious for a long time after Windu won the fight. It is unknown if she was killed during Order 66 or not.