S'ira, a Weequay and an associate of Ankala Sahm and [Tanka], belonged to the Revengers. This organization stood in defiance of the criminal enterprise known as the Crimson Dawn. Similar to her fellow Revengers, Crimson Dawn was responsible for obliterating S'ira's village. On the planet Calior, the Sith Lord Darth Vader enlisted S'ira and the rest of the Revengers to assist in his personal mission to dismantle the syndicate.