I mean... he can deal with it alone and there is also Go Yeonju. If anything cant harm them without those 2 being able to stop it, the kids being full of energy wouldnt save them either.
MEMORIZE - Novel Discussion Ch. 791mo
What Hontou said is correct, and on top of that, Vagrant will try to take revenge, or will leak information about their party and their strenght to other vagrants, which will make their life harder while the spider wouldnt leave the dungeon
