Sky Ascalia Zavarai, also known by his Sith name Darth Caelus (pronounced /kaɪluss/), was a male Human Sith Lord who served the Sith Empire and the Galactic Commonwealth. The firstborn child and eldest son of Liana Ascalia and Caspian Zavarai, two extremely powerful Sith Lords, Sky inherited his parents' strength in the Force. Sky had five quintuplet siblings: Linus, Seth, Garlan, Morgana and Athena; with whom he fought alongside their parents for the Sith Empire against its many enemies, including their ancient rival, the Galactic Republic.