"Kei-class members" are not only the bottom of the Demon Slayer Squad's contempt chain, but also miscellaneous soldiers who wear pants (not hakama pants). They have a natural identity gap with the "protagonist group". From the perspective of "Kai-class members", I will take you through "Demon Slayer: Kimetsu no Yaiba" and the comic contrast between "humble survival" and "fighting between gods".