The Sisters of the Void, alternatively referred to as the Voidsisters, were a trio of sisters who resided on the planet of Dathomir during the era of the Galactic Civil War.
After the blackwing virus outbreak on Dathomir, a number of Dathomiri from the Howling Crag Clan were infected. To stop the spread, the Galactic Empire killed most of the clan's members. However, three infected witches – Denkra Kymeri, Naija Kymeri, and Thestriel Kymeri – survived by employing spells to resist the disease. They became known as the "Sisters of the Void", adopting the titles "Voidsister Warrior", "Voidsister Huntress", and "Voidsister Spellweaver" respectively. Moreover, the three sisters gained the power to resurrect the bodies of deceased Witches of Dathomir and slaves, controlling them in combat.
As time passed, the sisters began to succumb to the infection. The Force ghost of their mother, Amaya Kymeri, dispatched a spacer with the mission to eliminate the three sisters.