The Editor with one of his Revisers.

Revisers are pink monsters whose main feature is their teeth. They work with the Editor to maintain the status quo in the Book of Everafter

When there is a problem, these monsters are sent to revise said problem and do so by devouring it. In the most severe situations, the story becomes a "page-one rewrite." In these cases, the revisers that are sent consume the whole story so that it may be redone properly without any unforseen complications.