Depa Billaba was a female Chalactan Jedi Master who served on the Jedi High Council prior to the Clone Wars and during it briefly, before the Blockade of Naboo, replacing the missing council member Sifo-Dyas. She later stepped down, at the end of the war.
In 19 BBY, Billaba was present on the Jedi Council, watching the live hologram recording of the Attack on Mahranee, which was a Separatist victory. After seeing this recording, Master of the Order, Mace Windu (also her former master), convinced the Council to go on a secret mission to kill Count Dooku. They sent Quinlan Vos and told him to ask Asajj Ventress for help.