Long ago, Vader had had a conversation with Padmé, about how if people didn't agree, they should be made to. Vader still believed that. He was, however, working on doing it with something less than smacking at differing forces with his lightsaber.

At least, in this case, it seemed to be working.

"People aren't meant to know me. I'm a threat, a weapon of the Empire. Not a person. I gave that up when I became this." The Sith inside the suit.

"I am grateful and I will remember." Given everything: "I will also come to your aide if find yourself in need."