Luke/Starkiller
"Leia mentioned that. She told me that you were his apprentice." Luke couldn't figure out what it was that the man was trying to get out of him or what point he was trying to make. "I never knew anything about him until after the battle of Yavin and it was some time after that before I found out that he was my father." It had certainly been a revelation and not one that he'd appreciated but it couldn't be changed and he wasn't going to try and hide who he was.
"My training might not have been what would be considered typical but I prefer it to be raised to fight for the Dark Side." He knew that Starkiller wasn't lying, he could sense that. Vader had indeed training him and Luke wasn't that surprised that Vader had planned to turn on the Emperor and take power for himself. Apparently he'd had that plan long before he'd found out who Luke was.