Peter Binsfeld

Peter Binsfeld was a German bishop and theologian. He wrote the Classification of Demons.

Background
Some time while he was alive, the Seven Deadly Sins found a way to escape hell and became active on earth. Binsfeld eventually discovered that the seven deadly sins were not simply human vices as previously thought, but were "actual devils".

After this understanding, he wrote the book Classification of Demons, which cataloged information about the ancient demons.

Appearances

 * Season 3
 * The Magnificent Seven (mentioned only)