Is Kiana the final herrscher?

Could you elaborate on whether Kiana is indeed the final herrscher? There have been speculations and theories circulating within the community, suggesting that her role may not be definitive. Are there any hints or clues within the narrative that suggest the possibility of a successor or another significant figure emerging? Additionally, what implications would it have for the overall story arc and the balance of power if Kiana were not the final herrscher? Is there a chance for a twist or a revelation that would shake up the current understanding of the hierarchy and the prophecy surrounding the herrschers?