As ruthless and sinister as her mentor, Tol Reban, Katya was also a staunch advocate of using manipulation to achieve her goals.
Katya had long blackish hair, pale skin, and cold blue eyes. She usually wore a comfortable black robe, wristwraps, black gloves, black pants and black boots, and carried a single lightsaber with a crimson blade.
Katya was born on Dathomir, but was abducted by Yeurl at the age of 3. Yeurl groomed her to be his successor, and when he recruited Tol Reban, Katya was assigned to him. At ruthless and cruel as Reban were, he was also an excellent teacher, and Katya soon became an accomplished warrior.
Katya remained the apprentice of Tol Reban, a unique situation within the Covenant.
After a mission on the planet Camden, she was taken as a Sith Apprentice by Yeurl, but remained under the tutelage of Tol Reban. After Reban became a Sith Knight, her apprenticeship transferred to him.
After the formation of the Sith Enclave, Tol Reban became the Baron of Ord Radarna. As his apprentice, Katya was offered a region of the world to govern as her own. She choose the moon of Ulmo, and was created Baronetess of Ulmo.