Board Thread:Versus Debates/@comment-37960523-20200308150511/@comment-34656247-20200316160444

There are other evidence, like in one scene in the manga with pein having a speech bubble next to him which says huf indication of him breathing.

There are different purposes of the king of hell, but when it's used for the purpose of interrogation/judgement, then only the victim can see them ;in other cases it's visible to everyone.