Zero (Hector Zeroni)
Zero is Stanley's friend at Camp Green Lake. He is quiet, resilient, and has a mysterious family history. Stanley helps Zero after he runs away, and their bond drives much of the plot.
Mr. Sir and the Warden
Mr. Sir is a strict counselor at Camp Green Lake, while the Warden oversees the camp's harsh routine. Their authority and secrets tie the story to the Yelnats family curse and hidden treasure.
For more details on the characters, see the Holes film page on Wikipedia.
