Technically, a person that has died within the dungeon has their soul trapped in it. With a suitable spell, they can stay dead indefinitely, and still be revived. But for the same reason they forego reviving the dude they found in the plant, it gets increasingly difficult the worse condition the body is in.

I also set up !dungeonmeshi@ani.social, I’ll be posting fanart and the like that I’ve collected over the years of reading the manga, as the anime progresses.