The Warden (Ms. Walker)—the terrifying woman who runs Camp Green Lake.
Stanley Yelnats (Caveman)—Holes’s main character; a fat, innocent, good-hearted boy.
The guard—a man who escorts Stanley to camp and carries a rifle.
The bus driver—a man drives the boys nine hours each way to camp and back.
Mr. Sir—one of the overseers at Camp Green Lake.
Mr. Pendanski (Mom)—the adult counselor in charge of D Tent.
Alan (Squid)—the first white boy Stanley meets at camp.
Lewis (Barf Bag)—the boy who had Stanley’s cot before he went to the hospital.
Rex (X-Ray)—the first black camper Stanley meets, wears thick glasses.
Jose (Magnet)—a Hispanic camper who wants to work with animals.
Theodore (Armpit)—the boy who tosses Stanley to the ground when they first meet.
Ricky (Zigzag)—the camper who hits Stanley in the head with a shovel.
The judge—the man who sentences Stanley to either camp or jail for stealing the sneakers.
Hector Zeroni (Zero)—the fastest digger in camp, Madame Zeroni’s descendent.
The Lump—a large and threatening camper.
Brian (Twitch)—the new camper who replaces Zero when he runs away.
Ms. Morengo—the lawyer who comes to get Stanley from the camp.
Mrs. Bell—Stanley’s math teacher.
Derrick Dunne—a boy who used to bully Stanley back at school.
Stanley’s father—an inventor working on recycling sneakers.
Clyde “Sweet Feet” Livingstone—the baseball star whose shoes were stolen.
Elya Yelnats—Stanley’s great-great-grandfather, who starts the family curse.
Myra Menke—the beautiful but dim girl Elya loved.
Igor Barkov—the fifty-seven-year-old pig farmer who also wanted Myra.
Madame Zeroni—the one-footed gypsy who advises Elya on love.
Sarah Miller—the woman Elya marries in America.
Katherine Barlow—the former schoolteacher who becomes a bandit.
Charles/Trout Walker—the spoiled young man who wants Katherine.
Doc Hawthorn—the doctor for old Green Lake.
Sam—the onion man, a black folk healer in old Green Lake.
Linda Miller—a former student of Katherine’s who marries Trout.
Mrs. Gladys Tennyson—a proper woman from old Green Lake.
Hattie Parker—the woman in old Green Lake who starts the lynching of Sam.
Walter, Bo, and Jessie—three men who buy onion tonic from Sam.