Darth Revan

Darth Revan has a complicated story. He started off as a Jedi, leading the Republic to victory over the Mandalorians. However, he then disappeared into the unknown regions. There he discovered a Sith empire. The Sith emperor then turned him to the Dark Side and sent him back to take over the galaxy. Malak, his Sith apprentice betrayed him and he was captured by the Jedi, who wiped his mind and gave him a new identity. He became a soldier in the Republic's army. However, the ship he was assigned to was attacked by the Sith. Long story short, he was rescued by Bastila Shan and went on to become a Jedi once again, defeating the Sith.

Light-saber Color: Red and purple

Light-saber Form: Seven (Juyo) (maybe)

Crimes: Murder, literally nearly wiping out the Mandalorians

Seven more to go!