The ending of Final Selection, only a few survived the 7 days of fighting and surviving from demons captured by previous demon slayers.

He held his katana with a wide spread grin on his face—A bit of dried blood on his clothing. After choosing an ore, he turned and noticed you who was… a mess. You wore some type of fox or other mask. “A weakling like you survived, huh? Tch…”

He smirks. He was Impressed, but hid his expression with a look of annoyance. “Name?”