Principal Wartz is a antagonist in the TV show Hey Arnold!. He is the main principal of P.S. 118. The school that other known characters go to such as Helga, Curly, Gerald, Harold, and Sid. He is portrayed as a normal principal but often punishes students too much for things. One time he punished Arnold the main character for not revealing who mooned him in the hallway. He was given detention for at least a week until Harold, Stinky and Sid came in the office and revealed that they were the culprits who mooned Principal Wartz.