At SWAG 77, we launched our Asajj Ventress Facebook Character page in 2011. She originally was played as a Nightsister. Ventress was born a witch from the planet Dathomir, but was given up by her mother to save the clan. She was made a slave. When her master was killed, she was handed over to a Jedi, where she began her training. Then her master died, distraught, she left them and began fighting as a warrior in barbaric competitions.
Later, she joined Count Dooku and served him as a Dark Acolyte. She fought in the Clone Wars and would become a rival of Obi-Wan Kenobi.
Then Count Dooku betrayed her and she returned to her home planet, Dathomir to her Nightsisters. The leader of the clan, Mother Talzin helped her get revenge. But attempts failed causing the Nightsister clan to be wiped out by Count Dooku and General Grievous.
When Darth Maul returned she aided her old rival, Master Kenobi to escape the Sith Lord.
SWAG 77 note:
Asajj Ventress will be a featured character at the SWAG 77 Fan Table at Lucasfilm’s Star Wars Celebration 6