Darth Xul

Darth Xuk was a Twi'lek male Sith Lord living around 174 ABY. Originally a member of the One Sith Order, he was baited by Darth Wyyrlok IV to defect with two others and created the Tripartite Empire. When Chairman of the Senate of the Galactic Federation Suvorov Palpatine was captured and placed aboard the Tripartite flagship Ark Hammer, he was present there. However, when Suvorov broke out with then-Jedi Padawan Ruslana Solo, he managed to defeat Xul as he was secretly a Sith himself.