Based on the information from the search results, it is clear that Fleur Delacour's sister, Gabrielle, would not have died if Harry Potter had not saved her.
Fleur Delacour failed to finish the second task because she was attacked by the grindylows. Because Delacour failed to finish, she never retrieved her younger sister, Gabrielle.
In 1994, Fleur was chosen as Beauxbatons Academy of Magic's champion in the Triwizard Tournament. Because she treasured Gabrielle, her younger sister was taken into the Black Lake under the influence of a magical spell during the Second Task.
We never do find out what happened to Fleur, but it is likely that Krum, under the same compulsion, disabled her as well. Barty, in the best Death Eater tradition, is trying to assure Harry's victory in the Task by eliminating his competition.
She seemed to be “brought in” for the Second Task.
The other three hostages were already at Hogwarts since they were all Hogwarts students, but it seems like Fleur's sister was brought in specifically for the task, perhaps since there was no one at Hogwarts she cared about much.
While Ron, Harry, and Hermione stayed at her house, Fleur cared about them in a mother-like way. Molly and Ginny Weasley in particular did not like Fleur, considering her snooty.
She definitely does not like Ron's crush on Fleur and that plays a role in her dislike. Ginny (and Hermione and Molly) definitely do see her as some kind of bimbo, and they are clearly wrong about that. But for all her other virtues Fleur is a pretty rude houseguest, who is open about her criticisms of the Burrow.
During his pursuit of the Snitch, he was hit in the face by a Bludger which broke his nose and gave him two black eyes. However, he caught the Snitch and ended the match on his own terms.
During the summer of 1995, Fleur secured a part-time job at Gringotts. It was then that she was reacquainted with Bill Weasley, who had returned from Egypt and taken a desk job to help the Order of the Phoenix, and the two began dating. Fleur and Bill dated for a year until Bill proposed to her.
As the couple began to take their vows, several guests began to cry, including Molly Weasley, Apolline Delacour, Rubeus Hagrid, and Hermione Granger. Molly, in particular, was in tears as Percy was the only member of the Weasley family absent from the wedding.
Through Fleur, Gabrielle was related to the Weasley family. She was saved in the Second Task of the Triwizard Tournament by Harry Potter, whom her sister became good friends with. Through Fleur, she was the aunt of Victoire, Dominique and Louis Weasley.
Fleur is extremely confident in who she is as a very attractive girl, and Rowling writes most of her other characters to hate her. Ginny doesn't call Fleur by her name; she calls her “Phlegm”. Molly also hates Fleur with the same internal misogyny Rowling projected onto her.
Also we know that Fleur is a distanlty part-veela, which is a fire-based creature, that her magic powers were limited because of the water and she was made weaker because of it.
Why does Fleur lose her accent in Deathly Hallows?
A possible explanation is that she improved her English in the time between the events of Goblet of Fire and the events of Deathly Hallows. Despite being French herself, actress Clémence Poésy speaks English with almost no accent, and actually had to fake Fleur's thick accent in her first appearance.
He respected her, admired her, and possibly even loved her. Hermione even told us that “[Krum] did say he'd never felt the same way about anyone else” (GoF 514).
For example: if Viktor Krum can transfigure his head into a shark's, like he does in Goblet of Fire, that doesn't mean he is an Animagus. Transfiguration is a form of spell-casting, whereas becoming an Animagus is forever. And yes, he could turn into a falcon.
In the film version, Barty Crouch Jr. has the habit of licking his lips when threatened, in a snake-like way, to which he occasionally shows while under the disguise of Alastor Moody. This action led to him giving himself away to his father following the second task of the Triwizard Tournament.
Ginny didn't like Fleur because Fleur treated her like a child and could be very bossy and rude. Hermione on the other hand didn't like Fleur because she was jealous of her good looks and she was upset that Fleur had kissed Ron on the cheek and she was also upset that Ron kept defending her.
Hermione disliked Fleur, probably because Ron was attracted by Fleur. It was obvious that Hermione had fell in love with Ron by then, after all, both Lavender and Fleur happened in Harry Potter and the Half Blood Prince. Another reason was that Fleur wasn't exactly comforting.
Harry becomes her youngest son's best friend in the whole world and Ron wrote to her about him as is evidenced by the fact she makes him a Weasley sweater for a Christmas present. She wants Harry to experience a form of motherly love he can actually remember. Harry is as good as her son.
