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.
Dudley Character Timeline in Harry Potter and the Order of the Phoenix
The timeline below shows where the character Dudley appears in Harry Potter and the Order of the Phoenix. The colored dots and icons indicate which themes are associated with that appearance.
Harry tries to leave the kitchen, but Vernon insists that Harry explain what happened to Dudley. Harry patiently explains that dementors suck out people's souls, that you can't punch a dementor,... (full context)