Kylo Ren vet ju om vad Fars öde är,
he trained under the person who was responsible for Vader's return to the Light Side of the force.
Snoke och Ren diskuterar det i filmen.
Från noveliseringen:
“Yes. Such a simple thing. Such a foolish error of judgment. A momentary lapse in an otherwise exemplary life. Had Lord Vader not succumbed to emotion at the crucial moment— had the father killed the son— the Empire would have prevailed. And there would be no threat of Skywalker’s return today.”
“I am immune to the light,” Ren assured him confidently. “By the grace of your training, I will not be seduced.”
Dessutom nämner JJ Abrams detta faktum i en intervju med IGN
“Kylo Ren idolizes Darth Vader, not Anakin Skywalker,” Abrams explained. “He idolizes what Vader represents and what Vader was trying to do. The idea that Vader didn’t succeed, if you look at it from Ren’s point of view, he was seduced by the enemy and failed because of that seduction. So the idea is that Ren wants to complete the thing that Vader started.”