Ankala Sahm was a human female who led the Revengers, a group that opposed the Crimson Dawn criminal syndicate. Having had her village destroyed by Crimson Dawn, she joined up with S'ira and Tanka, who had suffered the same fate, following Crimson Dawn operatives and striking against them. While on Calior, Ankala and the Revengers were assisted by servants of the Sith Lord Darth Vader, who also intended to eliminate Crimson Dawn, and the group subsequently was recruited in Vader's quest.