Darth Azula

"You've been horribly humiliated by the Jedi. The Sith want you. You could be one of us! You could rule the galaxy!"

- Darth Azula convincing someone to turn to the Dark Side.

Darth Azula was from the TV show Avatar, until she chose to be a powerful sith lord. She was often known for her powers of Force Lightning and humiliation. Her Force Lightning was strong enough to destroy a whole planet, and her humiliation often had many different effects. Her brother, Zuko, was known as the whiny pansy who couldn't handle one scar.

Rise to Power
She wandered the galaxy after quitting Avatar, learning to use a lightsaber and mastering her lighting bending into Force Lightning. She finally became a sith lord when she met a bunch of sith in a cantina, showing off her Force Lightning, which was now better than Palpatine's.

Attack on Tatooine II and Death
She was assigned to attack and destroy Tatooine II since it was a completely wothless planet. She fought through many people, killing dozens of them. She destroyed a couple buildings as well, until she was commanded to destory the planet. Azula went to her weird ship that looked like a place from Avatar, and prepared to blast Tatooine II with her Force Lightning. When she fired, Tatooine II's inhabitants used a giant mirror to deflect the blast, firing it back at Darth Azula's ship and destroying it, killing her.