If you would like your back-story to also be displayed include this in the .xml file of your custom sovereign.
<LorebookIntroText>You are a nobleman who fed off of the last resources available to the great houses of Resoln, during the collapse of the old-empire, to prepare himself to rule the post-cataclysmic world. He obtained schooling in military tactics, natural philosophy, and what little remained of magic-lore. He also exploited what wealth he could from the old-empire. With this wealth he will secure his ruling position.</LorebookIntroText>
Also, if you would like to change the background that your character sits on you can edit a few more lines by copying some of the other files.