Dromika, a female Human Sith, was the twin sister of Quillan and one of the youngest children of the Sith Lord Chagras and the siblings of Arkadia Calimondra. During the New Sith Wars, Byllura was controlled by the Chagras Hegemony. Following the death of Chagras, the ruler of the hegemony, Byllura became the capital of the Dyarchy and was governed by the Sith Lord twins Dromika and Quillan with Saaj Calician serving as its Regent. Their reign ended in 1032 BBY when Byllura fell to the forces of Arkadianate.