The secret apprentice

Background
Darth Vader's secret apprentice is most commonly reffered to as 'the Secret Apprentice'. He has no real name, but his codename is 'Starkiller'. He was discovered by Darth Vader on the Wookie home planet Kashyyk at the end of the Clone Wars when Vader was sent to find and destroy his Jedi father, Kento Nion. He was abducted by the dark lord and, unbeknownst to the Emperor, trained in the ways of the Sith for many years.

Skills
'Starkiller', as we will reffer to him as for the rest of this article, is extremely skilled in single handed Lightsaber combat, and can use many different Force powers including the ability to grip objects, Lightning, choke and the Jedi mind-trick.

Enemies
General Rahm Kota was the first Jedi that Starkiller was sent to kill by Vader. He was a skilled General in the Clone Wars who had refused to use clones, and instead used his own millita, and therefore wasn't killed when Order 66 was issued. It semmed that he was killed by Starkiller, but once Vader had 'killed' Starkiller, Starkiller found the now blind Kota and befirended him on Nar Shadaa, making Kota a key player in the birth of the rebel alliance.