A Force-sensitiveUmbaran, Sly Moore was not inducted into the Jedi Order, for she was abducted from Umbara by a tattooed Zabrakassassin named Darth Maul and imprisoned for months in an ancient tomb somewhere in the Cron Drift. While imprisoned, she was mentally and spiritually assaulted by long-dead Sith Lords on a daily basis and only her natural strength of will kept her from going completely insane. After surviving such rigorous trials, the Dark Lord of the SithDarth Sidious rescued the girl from the tomb and nursed her back to health.[4]
Known to the Umbaran girl as SenatorPalpatine from Naboo, Sidious cared for the girl and educated her in politics, forming a close bond over the years. The trust between Moore and Sidious was so strong, the Sith Lord revealed his own Force-sensitivity and his true identity as a Sith. Over time, Sidious let Moore in on the Sith Grand Plan to bring peace to the galaxy and topple the Jedi Order.[4] Vowing eternal loyalty, Moore went on to become one of Senator Palpatine's most trusted aides in the Galactic Senate and followed him from his days as Senator to the time he was elected Supreme Chancellor of the Galactic Republic.[1]
With the outbreak of the Clone Wars, Moore continued to serve her master, even impersonating his alter-ego Darth Sidious to force disloyal pawns into line.[7] As the war dragged on, Sly Moore came under scrutiny by the Jedi High Council; the Jedi Order's leadership correctly suspected that the mysterious Darth Sidious had infiltrated the highest levels of the government.[8] Before the High Council could complete the investigation, however, Chancellor Palpatine eradicated the Order and transformed the Republic into the first Galactic Empire. Attending the declaration of a New Order, Moore bore witness to the end of democracy all the while maintaining her ties with the newly-proclaimed Emperor.[9]
Appointed as one of the first members of Palpatine's Imperial Ruling Council, Moore was transferred to the secret Sith planet Byss to oversee the culling and training of captured Padawans and Jedi Service Corps members. Torturing the captives and pitting them against one another, Moore attempted to convert the acolytes of the Jedi Order into slaves of the dark side of the Force.[10] Moore thrived during the reign of the Empire, developing a cold rivalry with the jealous Grand InquisitorMalorum as the man climbed through the ranks of the Inquisitorius; Malorum often wondered why lesser beings attained the ranks he desired, pondering on Moore's presence.[11]
An Umbaran, Sly Moore could only see in the ultraviolet spectrum and wore a shadowcloak of her homeworld. A private person who revealed little of her torturous past, Moore's detractors in the Senate believed that she had a hidden agenda and that she was capable of driving others from office. Taciturn and ambitious,[6] Moore was a telepathy and was known to exude a fear-inducing stare.[2]