Harry's aunt. She's a thin and horse-faced woman who loves nothing more than spying on the neighbors. Though Petunia hates Harry, she knows that she has to continue to allow him to stay at her home. Dumbledore later explains to Harry that this is because Lily's sacrifice to save Harry will only continue to protect him if he remains with Petunia, Lily's sister. Harry is grateful that Petunia is his aunt for the first time when Petunia reveals that she knows what dementors are and grasps the implications of Voldemort's return.
Aunt Petunia Character Timeline in Harry Potter and the Order of the Phoenix
The timeline below shows where the character Aunt Petunia appears in Harry Potter and the Order of the Phoenix. The colored dots and icons indicate which themes are associated with that appearance.
...and felt cold and unhappy. Harry explains to Vernon that a dementor attacked Dudley, and Petunia adds that dementors protect Azkaban, the wizard prison. Both Harry and Vernon stare at her... (full context)
...he wonders out loud if they've joined Voldemort. Harry explains that Voldemort is back, and Petunia seems to comprehend the gravity of this. Harry is, for the first time, happy that... (full context)
...As Vernon rages at Harry, another owl drops a red, smoking envelope—a Howler—in front of Petunia. It's addressed to her. After a moment, it bursts into flames, and a horrible voice... (full context)
...Moody, Tonks, Lupin, Mr. Weasley, Mrs. Weasley, Fred, and George. The group approaches Vernon and Petunia, who are also there, to tell them that there will be consequences if they discover... (full context)