Forum:KB:Vader and the use of "thou"

As we all know, Darth Vader addressed Palpatine with the words: "What is thy bidding, my master?" once (or maybe twice) in the whole saga. But I was wondering: has anyone ever heard or seen him actually calling the Emperor "thou" in any canon source outside of this single phrase? You know, I've mostyl read EU stories in French translations, in which the Emperor is always addressed as vous&mdash;a polite form of address that is used when talking to strzangers, superiors or elder people. I wondered whether this line from Star Wars Episode V: The Empire Strikes Back was an unicum or if there have been other such occurences of "thou" in canon. --LelalMekha 17:49, May 26, 2012 (UTC)