Alphonse Perrier du von Scheck is the main antagonist of HeyArnold!:TheMovie, and was also mentioned in the chapter book Arnold for President, where Helga manages to get his help to build a skateboard ramp at PS 118.
He is the German American CEO of Future Tech Industries, a corporation that bought up and attempted to tear down Arnold's neighborhood.
He is direct descendant of Archibald Von Scheck, British colonial governor of Hillwood area during the Tomato Incident. Nick Vermicelli directly answers to him. It is likely that Archibald Von Scheck was a Hessian.