What is an ethical thing to do to someone who was, really, forced into his service? No. Did he feel guilt over it? No, not really.

But it was tied to regaining his wife and family, and it's probably not surprising how obsessive and focused he is on the goal, given everything. And to bind people to him so he can't be abandoned.

There's a moment where Vader pulled in on himself. He was levitating to be about his actual height, his chin tucked down and head turned away from Tech, arms shifting as if he crossed his arms over himself to grasp his right wrist in his left hand. It was possibly a familiar posture, one Tech might have seen or heard about, or one captured on the holonet of The Hero With No Fear being moody in the aftermath of a battle. "Rex knew we were together, but not the full of it. I couldn't tell him. I'd have been dismissed and her career would have been left in tatters."