Yeah this, my way of wording it was horrible lolI think they can see it when not being used to interrogate people i.e when reviving other pains or storing Bee and Naruto's bodies..
Same thing I was thinking onI think people who dead or revived after death can see the king of hell.
Edit : I think people with dojutsu like sharingan or rinnegan can see the king of hell.
Look at this idiot, there are 5 different logical explanations above him and he chooses to blame the writer for his stupidity. This is exactly why I don't like or want dumb kids watching/reading this story, all they ever care about are the fights and they use literally a fraction of their brain.Wow. Goddamit Kishi.