1. Zero: Stanley Yelnats IV, the protagonist, is nicknamed "Zero" because of his tendency to be silent and withdrawn. He rarely speaks and often prefers to communicate through gestures or brief responses.
2. X-Ray: Hector Zeroni, a talented storyteller and friend of Stanley, earns the nickname "X-Ray" due to his ability to see through things figuratively and literally. He is highly observant and seems to have a sixth sense for sensing hidden facts or objects.
3. Armpit: Jose, a member of the D Tent at Camp Green Lake, gets the nickname "Armpit" because he is known for his unpleasant body odor. Despite his hygiene challenges, he has a kind heart and often supports Stanley.
4. Zigzag: Ricky, another member of the D Tent, receives the nickname "Zigzag" due to the way he walks. His gait is described as unpredictable, and he often stumbles or zigzags when he moves.
5. Squid: Brian, the leader of the B Tent at Camp Green Lake, is called "Squid" because he has buck teeth that protrude from his mouth, resembling the tentacles of a squid.
6. Caveman: Stanley initially labels his attorney, Ms. Morengo, as "Cavewoman" due to her stern demeanor and aggressive representation of him. She later becomes a vital ally in his fight to prove his innocence.
7. Magnet: Stanley's great-grandfather, Elya Yelnats, is known as "Magnet" because he has a reputation for finding buried treasure using his magical charm. The charm was said to be passed down through generations of the Yelnats family.
8. Miss Walker: Kathryn "Kate" Barlow is posthumously known as "Miss Walker" by the characters. She was a schoolteacher in Green Lake many years ago and played a crucial role in the town's tragic past.
These nicknames reflect the unique characteristics and qualities that define the characters in "Holes," adding layers of depth and intrigue to their personalities throughout the story.