A Thief is an individual who uses stealth, speed, and concealment to his advantage. This type of warrior will never fight fair, and will have no problem stabbing you in the back. A well educated thief can use these tactics to gain entry to nearly anything with the help of a collection of specific tools designed for the art of theft.
A Thief is a Light DD Damage Dealer, and uses a Dagger.
This class also gets a "new look" upon reaching certain levels.