Deara Antilles was a female Human, the sibling of Queen Breha Organa. She lived around 18 BBY. Functioning as both her sister's advisor and the guardian of Breha's adopted child, Leia, she secretly worked as a spy for Darth Vader, unknown to her family. This arrangement came about after the Sith Lord issued a threat to her during her time on Coruscant. Eventually, Ferus Olin and Bail Organa uncovered her deception. Consequently, Breha showed compassion towards her sister, choosing to banish her to Ankori-7.