Due to an oversight, the captive Lord Kermann held in Shalatuwar originally displays a traitor knight targetting icon at top of the screen. This is because all knight type non-player characters are based on the traitor knight class. There is an icon found in the game files for the duke, however due to probably and oversight, this icon is never loaded into memory or assigned to any character.
By adding a couple lines to the game's code, it's possible to restore the duke's intended.