The Auditor is the main antagonist of the Madness Combat franchise.
He is a mysterious and powerful dark being and the leader of the A.A.H.W. His plans revolve around eliminating Hank, the main protagonist and his arch-nemesis, so that he may gain control over Nevada. Following the death of the Sheriff - who was in fact, just a servant to the Auditor himself - the Auditor shows as actual leader of A.A.H.W.
Throughout game and author's statements, it is revealed that The Auditor is actually a god and member of Higher Powers (Along with other Employers), whose true goal it is to overwatch and be "custodian" of Universe and who desires to "bring order" into Nevada