If Vader's energy is a quiet rage, then Kylo's is a quiet guilt, knowing just how thoroughly Snoke did have hold of him for a time. Knowing now that there was even more manipulation in that than he realised, with Palpatine behind the scenes. His hand clenches to a fist against his leg.

"I listened to Snoke, for a long time. More than I should have." He doesn't want to say just how long. He doesn't want to admit that more than he should have entails having killed his own father. He doesn't know how Vader would react to either of those things.

He shakes his head, clearing his thoughts as much as he can. "But he's dead now. I killed him. And I won't serve Palpatine." Even if he'd played along in the moment, he has no intention of following him, and that conviction is only stronger knowing that his grandfather feels the same.