Fleur Delacour is a beautiful witch - her grandma was a Veela - who comes from France and visits the wizard school of Beaubatons there. She and some other students come to Hogwarts for the Triwizard Tournament, where she meets Harry, Herminone, Ron and Bill Weasley - her future husband. During the Tournament, Harry saves her sister Gabrielle. She is very dismissive at Hogwarts and criticizes everything there, loud enough to be heard by everyone. Due to her Veela blood, she is very attractive to men and boys, and she knows exactly about her beauty and that she has some power over men.
In summer 1995, she takes a part time job at Gringotts in London, to improve her english - and probably to get to know Bill Weasley better. About a year later, they become engaged. Their wedding is in summer 1997, and the very same day the Ministry of Magic falls to the Deatheaters.
Fleur helps Harry to escape from the house of the Dursleys by drinking polyjuice potion and faking to be Harry - as well as some other do. She fights at the side of her husband Bill and the other during the Battle of Hogwarts.
Bill and Fleur have 3 children, Victoire, Dominique and Louis.
Her wand has a core made from Veela hair from her grandma.
She has silvery-blonde hair, blue eyes and very even white teeth, her voice is described as "throaty".
Her name is french and means "flower of the court" if you translate it to english.
Her school Beaubatons is the best known school for wizardry in France, even though there might be others.
Veela are fairylike women with silvery-blonde long hair which is still moving even when there is no wind at all. Men affected by them will do the most silly things, just to get recognized. But when a Veela is angry, she will show an entirely different face, they transform into scary creatures with scaled wings and can throw fireballs on their victims.