My Preferred Pronouns are "Your Most Serene Royal Highness Who Must Be Obeyed", "Her Most Serene Royal Highness Who Must Be Obeyed", and "She, The Most Serene Royal Highness Who Must Be Obeyed".
Any abbreviations or variations is a Cosmic Insult and will be dealt with accordingly. /s (just in case you don't realize I'm joking!)