Darth Cyrus was a person that lived on Tatooine that had an allergy to ion energy.
As a child she was a singer that became a sensation in Chalmun's Cantina until she was fired for smiling instead of singing. She became angry and ran into a angry Jawa named Jaxawa that had just been awaken from a nap and zapped her with his ionization blaster in the head. Because of the impact of the ion energy, her body started decaying until Jaxawa and his family of 14 built a suit based off of the designs of Darth Vader's armor to keep her from dying.
Shortly after the completion of the suit, Jaxawa was accidentally killed by a clone trooper by the name of Delta-40. Darth Cyrus grew mad and began begging for money to build a Death Star so she could blow up Chalmun's Cantina and the Empire's Death Star to get back at her boss. She died during the construction of her Death Star, and it was later converted into a Cantina by her old boss.