Darth Loosipher, self-dubbed the Angel of Light, was a Diathim Sith Lord from the moons of Iego. He was Sith'ari after he led a rebellion against Darth Disibre. Unlike most Federal Sith, Loosipher was not a member of the Jed'ari Order or Dark Assembly. He was possibly the remnant of a fallen Sith Order.