Stop! I know what you're thinking. Yes, there have been many female Sith Lords in the Star Wars canon, but all of that was swept away when Disney ditched the old Extended Universe. Sure, Knights of the Old Republic II's Darth Traya was one of the most interesting characters in the franchise, and Darth Zannah, the apprentice of Darth Bane, was no slouch either, able to drive her opponents insane by conjuring their worst fears (Asajj Ventress was never a Sith, by the way). But that's all out of the continuity now, meaning that as of this moment, Lady Shaa is the only canonical female Sith Lord.