"I know about Darth Vader," he confirms, quietly reaffirming what Ezra already seems to know. "I found out about... half a year, three quarters of a year ago?"

There's a flash of memory, unshielded to a sensitive telepath. Pain and horror and a cold nothingness of deep shock as Vader stands with his hand outstretched. Father and son, echoing through that mechanical voice box.

And it's gone and Luke remains calm and quiet through it.

"Yes. He killed the Emperor, but was fatally wounded doing it. Protecting me." And isn't that a nice little clusterfuck of complicated emotions?