Harry's Muggle cousin. Dudley has been overweight his entire life, but in the year before the start of the novel, Dudley took up boxing and is now a boxing champion. Harry isn't sure this is a good thing, as learning to punch accurately just makes Dudley a more successful and dangerous bully. He spends his summer running around Little Whinging with his friends, vandalizing the park and beating up kids. Dudley is afraid of Harry’s magic and so leaves Harry alone for the most part. One day a dementor attacks Harry and Dudley, and because Dudley can't see dementors, doesn't trust Harry, and doesn't understand how to fight dementors, he tells Vernon and Petunia that Harry was the one who hurt him.