Who are the warden mr sir and mom?

In the book "Holes" by Louis Sachar, Mr. Sir is a gruff and somewhat antagonistic warden at Camp Green Lake, where the main characters are sent to dig holes as punishment. "Mom" refers to a character named Madame Zeroni, who is a significant figure in the backstory involving the main character, Stanley Yelnats. The warden, Mr. Sir, and Mom all contribute to the themes of fate, family curses, and the importance of history in the narrative.