Stanley Yelnats is the dynamic protagonist of the celebrated novel Holes and is depicted as an insecure, overweight boy who initially lacks self-confidence. He is also an honest, genuine person who is easy to get along with but seems to have terrible luck, which is something that has been passed down through generations and stems from a longstanding family curse. Despite Stanley's naturally timid, passive personality, he proves that he is versatile and can quickly adapt to any situation. When he first arrives at Camp Green Lake, Stanley allows others to pick on him and does not defend himself. He also struggles to fit in, and the arduous labor takes a toll on his mind and body. As the story progresses, Stanley begins to adapt to the hostile environment by becoming physically and mentally tough.

In addition to his newly acquired physical and mental strength, Stanley forms a friendship with Zero and demonstrates his benevolent nature by teaching him how to read. Stanley is also observant and discerning. He recognizes that Kissin' Kate's gold lipstick tube is a significant piece of evidence but is careful not to disclose its actual location to the Warden. After Zero runs away, Stanley demonstrates courage, loyalty, and integrity by fleeing the camp and saving his friend's life. By the end of the story, Stanley has experienced a remarkable transformation by breaking his family's curse and developing confidence and self-esteem. Overall, Stanley is a dynamic character who is genuine, honest, and loyal.