Mario "Mr. Sir" Sevillo
Mr. Sir is a supporting antagonist in the 1998 novel and the 2003 live-action Disney film Holes. The head counselor of the Camp Green Lake prison working under Warden Louise Walker, Mr. Sir was once a paroled criminal, known by the name Mario Sevillo, leaving him to be monitored under the watchful eye of Walker. Nonetheless, he was assigned to find the legendary treasure left being by Walker's family in the Camp Green Lake. Although he appears as a man committed to his duty, his extreme and unorthodox methods towards the imprisoned children of the camp, who serve as a labor force, allowed them to revealed signs of distrust and rebellion against their former counselors. He also appears in the second Disney Heroes vs. Villains as one of the henchmen of warden Louise Walker and railroad tycoon Latham Cole, serving under their wing for Latham's grand scheme.