Who is mr pudy in al Capone does my shirts?

In "Al Capone Does My Shirts" by Gennifer Choldenko, Mr. Pudy is the warden of Alcatraz, where the protagonist, Moose Flanagan, and his family live. He is portrayed as a strict and somewhat intimidating figure, representing the authority of the prison. Mr. Pudy's character adds to the tension of life on Alcatraz, especially as Moose navigates his responsibilities and challenges while living in such a unique environment.