Born 26 BBY, Lillium was found by a Jedi seeker and brought to the Jedi temple on Courasant within the first few months of her life. When she was four years old, the Clone Wars began. Though the Jedi were heavily involved, she was still far too young to be anywhere close to it. However, the war still heavily affected her life in the temple, as it did everywhere in the galaxy. Over the next three years of war, she began her first exercises in learning the force with the other younglings in her age group. Though she knew how horrible it was, she couldn't help but want to join in the fighting as soon as possible to help win the war.

However, the war would come to a sudden and bloody end before she was even apprenticed. Lillium was seven when Order 66 was executed, and she watched with her peers as the clones who were always kind and friendly to them before suddenly turned traitor and stormed the Jedi temple halls, killing any Jedi or padawans who tried to fend them off. Lillium watched, huddled in the back of a room with her youngling group, as their instructor was killed trying to protect them from the clones. By some miracle, as the clones raised their blasters to shoot down Lillium and her class, they received transmissions of special orders, and instead stood guard around the shaking and sobbing younglings, blasters in hand, masked faces completely expressionless. While guarded by the clones, Lillium could still feel the death of all the other Jedi throughout the galaxy.

Lillium and her class of younglings, over the next several years, were brought into the inquisitor program. They moved from planet to planet, enduring different levels of work, instruction, and pain. Many of her classmates died before the remaining students were brought to Mustafar for their training to be completed. Lillium stubbornly held out as long as she could, desperately trying to hold onto the light, but the crushing power of the darkside present on Mustafar was more than enough to break her completely. 

Lillium was renamed the Eleventh Sister, and spent five years training intensively with the other inquisitors, leaving rarely for special missions or tests. On the occasion, she would find herself stationed back at the Jedi temple- much different now than how she remembered it as a child, with none of the warmth. She'd spend days coming through the archives, coming through information she was never allowed to view as a youngling, and submitting anything of interest to her superiors or ISB agents.

Ten years after order 66, in 9 BBY, the Eleventh Sister is set on a special mission with one other inquisitor to hunt down and kill a Jedi survivor who had recently resurfaced. This mission was the Eleventh Sister's first time experiencing the galaxy with such freedom, but so broken by the dark side, she couldn't even find any joy in it, her sole focus on completing her mission...