What this arc sets up directly:
While the slayers train, the King of Demons, , is not idle. Having discovered that Nezuko Kamado has conquered the sun, she has become his primary target. The Hashira Training Arc concludes with a chilling realization: the time for training is over, and the final battle at the Infinity Castle is about to begin. Demon Slayer- Kimetsu no Yaiba Hashira Training...
The Hashira Training process is divided into several stages, each designed to test a specific aspect of a trainee's abilities. What this arc sets up directly: While the
Managed by the Serpent Hashira, Obanai Iguro . the King of Demons
Without the Hashira Training Arc , the Final Battle fails. Why?