The characters here consists of Sheriff and a bunch of ATP Engineers.

Sheriff is an authority figure from Madness Combat, and is of higher authority of Nexus City in Madness Combat: Project Nexus. He leads a faction in charge of protecting the Industrial Sector of the southern part of Nexus City known as the Matter Energy Reclamation Corporation (MERC).

He's recently been promoted to being one of the high authority figures in charge of the safety of Nexus City, ever since Hank did some personal damage to him and his forces. He learned to step up more since then, even bettering his fighting abilities.

ATP Engineers also originate from the Madness Combat Series, also Project Nexus.