Syanna says she will go to him. Answer how you wish. She is concerned Dettlaff might be furious enough to level an entire city, something he is more than capable of. Before this occurs, you exit the keep, meeting with the Duchess and Damien. Anna is shocked to see her estranged sibling, but Syanna greets her with resentment, snapping the olive branch Anna offers her. While Damien escorts Syanna to the Palace, the Duchess thanks you and vows to try Roderick for treason and blackmail.
Her demeanor changes when you answer (as you wish) regarding Roderick’s lack of culpability in all of this, and revelations of Syanna’s antics as chief architect of the recent knight slayings fall on deaf ears. When Regis lets slip that Dettlaff was the vampire in question, the Duchess becomes enraged that you kept this information from her. Though you have three days to bring Syanna and Dettlaff together (or face the destruction of Beauclair), the Duchess won’t hear of it. She wants the head of the beast, and she’s particularly forthright with this message. The quest (and your dressing down) then concludes.