Rando Slayers start learning Moon breathing, what does Kokushibo do?

Shortly into his fight in Infinity Castle some rando, unnamed slayers see Kokushibo fighting with Gyomeo and crew. Five random slayers immediately lock up on Moon breathing and start wrecking the amped up mook demons even harder. These five randos become SSVA Tanjiro level and the visualizations of their techniques are full and legit.

Does Kokushibo decide ignore Gyomei and peers to kill the randos to see if they’re good enough to inherit Moon breathing? Is Kokushibo gonna pull more moves to see if they can copy other Moon breathing forms?