Depa Billaba/Legends

Depa Billaba is a Jedi Consular, and she was the padawan of Jedi Master Mace Windu. She is the only other Jedi to master Vaapaad, a form of fighting with the lightsaber. Unfortunately, Depa turned to the Dark Side of the Force while she was on assignment in Haruun Kal. Mace Windu tried to save her, but it is unknown if she ever recovered.