Sith Training Droid

Sith Training Droids were an advanced series of training droids used by the Order of the Sith Lords and were based on the design of the holodroid prototype unit known as PROXY. Constructed on the vast ocean-covered world of Kamino, the training droids were primarily used as instruments in a secret project conducted under the surveillance of the Sith Lord Darth Vader. Following the redemption and death of his former secret apprentice, Galen Marek, Vader was determined to create a "new Starkiller" by utilizing the experimental advanced cloning process.

In order to ensure that the perfect clone would learn in a matter of months what took Marek years to learn as an apprentice, part of the overall process included using the training droids to help the clone in developing his inherent skills with a lightsaber. The other purpose for the droids was through their built-in holographic technology. By mimicking the appearances of several individuals who were close to Marek before his death, the clone would have to overcome the psychological side-effects of his genetic template's imprinted memories.