[ Not much older than him...? It was hard to imagine anything like age applying to Vader; sure, he knew he was human and not a droid like an embarrassing amount of people seemed to think, but still. Maybe... were the Clone Wars not all that long ago for him? Did his father just die protecting the Emperor? That would explain the scars; maybe the need for the breath mask came later. ]

[ Luke took a deep breath as he sat down, before he started talking, telling him about how he found him trying to stowaway on a cargo ship supplying his Star Destroyer, the years he would call him while at the Academy, telling him stories about his father, about graduation, the Rebellion, and... ]

...you wanted us to let the Rebels destroy the Death Star. After what happened to Alderaan, how that felt... there was no way I could disobey that order.

[ He looked down at his gloved hand, flexing the metal joints. ]

We succeeded, but... Teak was shot down by a Rebel ship, and I was injured trying to protect you. I just woke up from that not all that long ago.