Taking advantage of the free Nimona video and....wow, the Director really believes her own bullshit here. Like it's not just a show for Ballister's sake (or at least, not completely), she genuinely believes that he's ultimately responsible for her actions by being common and disruptive and that he forced her to murder her queen to stop him from becoming a knight. "Today, everyone will see you for who you really are." "She thought someone like you could be a hero, and it cost her her life." She literally runs Gloreth's direct descendant through with a sword and then in the moment after he "dies", her reaction is "May Gloreth forgive you." Not me, never me, no matter how many people I have to kill. May Gloreth forgive you for existing in a way that inconvenienced me even slightly.
Like the religious aspect is not subtle, as far as the Director is concerned her every word and thought and action is the will of Gloreth herself and challenging her is a sacrilegious act. Ballister can change, Ambrosius and the knights can change, the whole kingdom can sit there watching Nimona break down and decide they were wrong about her and accept her, and the Director is still standing on the battlements demanding that they blow up the city because it's what she wants and the mere idea that she could ever be wrong is blasphemy.
Which is a genuinely good message for the film's younger audience as a whole. "Yes, people can change and become better. Yes, whole societies can change and become better. Yes, people deserve second chances. But there are some people who cannot and will not change, and you shouldn't lose sleep over your inability to convert them."