Shmi Skywalker

Shmi Skywalker is the mother of [Darth Vader]. Although she dosen't appear ingame, her grave is involved in the quest, [Grace of Shmi].

Star Wars Lore
As the oldest known Skywalker ancestor, Shmi Skywalker Lars was the mother of the Jedi Anakin Skywalker, as well as the paternal grandmother of Luke Skywalker and Leia Organa Solo.

Born on an unknown world, Shmi was sold into slavery at an early age. In 42 BBY she gave birth to a son she named Anakin, who also served as a slave. She cared for her son greatly, and was willing to do anything to help him. After Anakin left to become a Jedi in 32 BBY, she was sold to Cliegg Lars, who freed her and married her. Just before the Clone Wars, Shmi died in her son's arms after being brutally tortured by a band of Tusken Raiders.