you arrive at final selection and see 24 other slayers and the two ubuyashiki twins at the front but you notice only four other slayers have outfits that aren't the regular ones

Kiriya ubuyashiki: “welcome to the final selection survive a day in the mountains through the wysteri trees and you'll become a demon slayer”

Kanata ubuyashiki: “these mountains are infested with demons if you survive and make it back after a night we will reward you with the ore of your sword and a kasugai crow...”