Maris Brood

As an infant she was found by the Jedi Order and taken into training. Trained as a Jedi by her master on the starship Gray Pilgrim, she was distanced from the rest of the order during the Clone Wars. Due to their isolation, Maris and her master did not experience the execution of Order 66 first hand. Feeling the death of many Jedi, Brood’s master set out to recover evidence of their fate.

He was able to inform Maris of the destruction of the Jedi and Darth Vader’s role in their deaths before going missing. Bent on revenge, she set out to hunt and destroy Darth Vader. Being intercepted by surviving Jedi Master Shaak Ti, Maris was persuaded away from the dark side of the Force and went into hiding in the forests of Felucia. She was found there by Vader’s apprentice, Galen Marek during his second visit to the planet.

She wielded twin red lightsabers with tonfa shaped hilts. While on Felucia, she took to using a pair of guard shotos, which she wielded against Starkiller.

Source: Wookiepedia