Dean Thomas is one of the many fictional supporting characters from the Harry Potter series, a book series created by J.K. Rowling. He is a Hogwarts School of Witchcraft and Wizardry and House Gryffindor student, and member of Dumbledore's Army under the leadership of his classmate, Harry Potter.
Dean Thomas attended Hogwarts and was sorted into Gryffindor, a house known to hold courageous and determined wizards. He was best friends with Seamus Finnigan, and good friends of Harry Potter, Ron Weasley, Hermione Granger, Neville Longbottom, and Ginevra Weasley. He joined Dumbledore's Army, led by Harry Potter. He fought and survived in the battle of Hogwarts, and witnessed the death of Lord Voldemort. His life after the war is unknown.