Emperor Palpatine

Emperor Palpatine, also known as Darth Sidious and Chancellor Palpatine, is the ultimate lord of the sith, acting as the main antagonist of the Star Wars films, specifically the original trilogy and Revenge of the Sith.

Past
Born into a rich Naboo family, the greatly sociopathic and highly sadistic Palpatine became the apprentice of Darth Plagueis, one of the most powerful Sith lords known to the galaxy. Palpatine inherited Plagueis's dangerously high amounts of powerful by killing the Dark Lord in his sleep after training. Becoming the practical mascot of the Sith, Palpatine clad himself in an enigmatic cloak and got his own apprentice, Darth Maul. As the Sith are naturally bitter enemies against the Jedi Order, Palpatine, now referred to as his Sith title Darth Sidious, waged war upon the order by organizing an army of elite, hostile robots led by a group of devious yet intelligent leaders. The organization was called the Trade Federation and it rivaled the Jedi's allies, the Senate and Republic.

At the same time, Sidious masked himself as the kind, elderly leader of the Senate with his master persuasion skills, working for both sides at the same time. When Darth Maul was "killed", a young former slave Anakin Skywalker became a Jedi, and the Trade Federation was crippled, Sidious turned to different matters. Clone Wars and Darth Vader He gained another apprentice, former Jedi master Count Dooku, and watched the war between the Republic's army of Jedi led clones and the Trade Federation's army of CIS general led droids.

As an emperor
When Anakin Skywalker, now a respected Jedi general, got his lover Padme pregnant, Palpatine took Anakin's dangerous love for his wife and twisted it. Telling him that joining the Dark Side and becoming a Sith could save Padme from certain death, Palpatine had Skywalker became his new apprentice (after Dooku was murdered by his very successor) named Darth Vader. Anakin then used his connection with the Jedi to slaughter all of them with the help of his blindly loyal clones troopers who transformed into stormtroopers. The Republic and Senate crumbled beneath the booted feet of Skywalker and Palpatine, and they established a new order known as the Galactic Empire to "manage" the galaxy's safety when it was really just a cover up to selfishly control it. Though Padme died in child birth after delivering two children and Vader was forced to don a suit of life sustaining armor after suffering severe lung and flesh injuries, this only strengthened the Sith's bitter hate.