Starkiller kept his smile at bay. The smile that would say it all, and explain his exact training. Well, not exact. "Darth Vader." Starkiller said coolly but mixed in a hint of vile in his tone to help express and sell his distaste of his master.
Starkiller was very interested in the others. He could feel a number of people who were equally strong in the Force. This one now in front of him was especially powerful.
Catching the tensing and sensing a change in the man, told Starkiller all he needed to know of the Jedi. He knew of the Emperor, and Darth Sidious.
Perfect. "Greetings, Master Kenobi." Starkiller continued probing as he offered a polite bow to the Jedi. "I have no name, but Starkiller."