>>715082387
The goal is to fulfill the prophecy as smoothly as possible with as little hardship so the general populace can sleep easy knowing they are no longer foretold to die horribly. The Girl is the sacrifice, not The Cage or even The Knight, which is why Ralsei and Susie react the way they do to the smashed prophecy panel. In the eyes of those in on the conspiracy, the loss of one single social outcast that nobody loved is an acceptable tradeoff if it means everyone else gets to live free and comfortably.