The Princess of Dune

This story unfolds two years before the events of the main "Dune" due to two women who once played outstanding roles in the life of Paul Atreides: Princess Irulan and the Fremen Chani.
The power of House Corrino is under threat:... there is a rebellion in the army, provoked by the reckless actions of Shaddam IV. The situation must be handled by his daughters, primarily the heir, Princess Irulan, who faces a difficult task: not only to preserve the Empire and uphold its interests but also to not lose her own voice amidst the intrigues of the Bene Gesserit, the Cosmic League, and even her own sisters.
At this time, Chani, the daughter of the imperial planetologist, along with her half-brother and a group of active youth, is desperately fighting for the independence of the Fremen and is also trying to fulfill her father's dream of a green Arrakis.
Who among these two is the true princess of Dune?