Very interesting development~ Seems like an interesting diversion before the rest of the arc, and maybe we'll get some lore about the Ranking too.
I love that the Rankings dude started out as just some dude, he didn't seem remarkable or strong, just the guy they got to do the evaluation. Then you learn more and realize he's actually super instrumental in this whole process and seems pretty strong too, and certainly knows a lot of stuff that none of our protagonists know. Then you see him this chapter and he's just fartin around by a campfire like a regular dude again. I feel like Ousama Ranking is great at making characters that believably occupy all these spots simultaneously.