The Fallible Fiend

is a Japanese light novel series written by LS Decamp, with illustrations by Ayumi Konomichi. The series began publication on April 10, 1997 by ASCII Media Works under their Dengeki Bunko publishing imprint.

Synopsis
At this rate, all the people who live in the underground city of Eel will be messed up by the army of the Parua people who eat humans. Zudom set out north to seek help from Solimbria. When he has to hurry, he rushes and eats and sleeps repeatedly. A number of strange people appearing one after another, such as a bandit with a tight dialect, a professional wrestler and a stupid president, a caveman who worships the god of the big cock, and a barbaric but kind nomad. Can the devil's apprentice Zudom save Eel after overcoming the many difficulties that stand in his way? Can he safely finish the apprenticeship? The final version of the gag fantasy that plunges into war.