Vaylin is daughter of Valkorion, the Emperor of the Eternal Empire of the planet Zakuul, and Senya Tirall of the Knights of Zakuul, as well as the younger sister of her twin brothers, Thexan and Arcann. Following Valkorion's supposed death in 3637 BBY, Vaylin effectively ruled the Eternal Empire with Arcann as High Justice. Following the dethronement of Arcann. Vaylin became the new Empress of the Eternal Empire with Scorpio as her new advisor. Vaylin began a campaign of war and invasion hunting for her mother Senya and The Former Emperor Arcann.