In one plotline, Fleur could be the target of a curse that slowly drains her magic. Harry, as her bodyguard, has to find a way to break the curse while keeping her safe from those who might want to take advantage of her weakened state. This could involve seeking out ancient spells and potions, and they might have to journey to dangerous and mysterious places. As they do so, their relationship could evolve from Harry simply being a protector to someone Fleur deeply trusts and relies on, and there could be hints of a romantic connection developing between them.
A plot could involve Fleur's sister having a special ability that she has to keep hidden. Harry discovers this secret accidentally. For example, she might be able to communicate with magical creatures in a way no one else can. Together, they could use this ability to help Hagrid with some of his more dangerous and unruly creatures. Or, she could be a target of the Death Eaters because of her family's connection to the Beauxbatons Academy. Harry then has to protect her, leading to a series of action - packed scenes around Hogwarts and the wizarding world.
In this fanfic, it might be that Fleur has been wrongly accused of a crime by a powerful magical authority. Harry tries to defend her but is captured instead. The authority tortures Harry to force him to give up on Fleur. However, Harry refuses. He endures the physical and mental pain of the torture. His perseverance might inspire some of the other characters to see the truth. Eventually, they join forces with Harry and they manage to expose the real culprit and save Fleur.
One possible plot could be that in the wizarding world, Fleur is in some kind of danger. Maybe she's being targeted by dark wizards who are after her Veela heritage. Harry, being a well - known and powerful wizard, is assigned as her bodyguard. Along the way, they start to understand each other better. Harry learns about the unique aspects of Fleur's Veela nature, and Fleur sees Harry not just as the 'Boy Who Lived' but as a real person with his own insecurities. They might face various challenges together, like escaping from traps set by the dark wizards and also dealing with the public perception of their relationship as bodyguard and protectee.
Perhaps Fleur is being controlled or influenced by a dark force. In the Harry Potter universe, there are many dark magic entities that could manipulate someone into kidnapping Harry. It could be that she is under the Imperius Curse or some other form of mind control. Another reason could be that she has some sort of personal vendetta against Harry or those close to him, and kidnapping him is her way of getting revenge. She might think that Harry has wronged her in some way, whether it's real or just in her deluded perception.
Maybe Fleur has some ulterior motive. She could be under the influence of a dark wizard who forces her to kidnap Harry. Or perhaps she believes Harry has something she needs desperately, like a powerful magical item that she thinks can save her family or something.
Maybe Harry leaves the wizarding world and uses his magical skills in the muggle world as a mercenary. He could be hired for dangerous jobs that require a touch of magic but need to be kept secret from the muggles.
Another plot could be a magical adventure where Harry and Fleur are forced to rely on each other in a dangerous situation. They develop a deep respect for one another, and it could be a story about how that respect could potentially grow into a non - sexual form of love. For example, they might be in a place filled with dark magic and have to use each other's unique magical abilities to survive.
One possible reason could be that Fleur sees Harry's courage. In the 'Golbery of Fire' events, Harry shows great bravery, and Fleur might be attracted to that. She herself is a confident and somewhat proud character, and a brave partner like Harry could be appealing to her.
One possible plotline could be that it's set after the war. Harry and Fleur find solace in each other's company. They might be sitting by the fireplace in the Burrow, and as they cuddle, they share stories of their past traumas. Fleur could talk about how difficult it was for her being part - Veela during the war, with people being both attracted and distrustful of her. Harry, in turn, would open up about his experiences with Voldemort. Their cuddling becomes a source of comfort and a sign of a new beginning for both of them.
One possible plotline could be them collaborating on a charity event. They both come from high - profile families and might be involved in fundraising and helping the community together in the fanfic.