Yes, there might be such fanfiction in the vast world of Harry Potter fanfiction. Fanfiction often explores alternative storylines and relationships. However, this particular scenario goes against the original story's canon where Bill marries Fleur. But in fanfiction, writers can take creative liberties and come up with all sorts of interesting and unexpected twists.
There might be such fanfiction out there, but it's not a very common or canon - compliant concept. In the original 'Harry Potter' series, Bill and Fleur are in love and get married. Fanfiction often explores alternative scenarios, but this one might be a bit of a stretch. It could be difficult to find a well - written piece on this specific topic as it goes against the established relationships in the books.
There could be. Fanfiction is a vast world. Some authors might explore such a complex relationship shift in their stories. However, it might not be as common as more typical pairings in the Harry Potter fandom. You could also check fanfiction communities on Reddit or Tumblr for recommendations.
It would probably be full of drama. Bill would have to break Fleur's heart, which could be a very emotional and complex part of the story. Hermione, on the other hand, might be initially hesitant about getting involved with Bill as it goes against the normal relationships in the wizarding world. There could be a lot of tension between the three characters, and the fanfiction might explore how the other characters in the Harry Potter universe react to this unexpected change.
One possible plot could be that Bill discovers some new side of Hermione during their interactions in the wizarding world post - war. Maybe they work together on some important project and he starts to see her in a new light, gradually falling out of love with Fleur. Another plot might involve some sort of magic or spell that alters Bill's feelings, making him attracted to Hermione instead. However, this would be quite a complex plot to develop while still remaining somewhat true to the original characters.
Archive of Our Own (AO3) is a great place to start. It has a large collection of Harry Potter fanfiction, and you can use the search bar to look for stories with this specific plot. Just type in 'Fleur leaves Bill for Hermione' and see what comes up.
In a fanfiction, perhaps after the war, Hermione decides to study some new forms of magic that Bill is an expert in. They start spending a lot of time together in Bill's study. Bill is impressed by Hermione's intelligence and eagerness to learn, and Hermione is drawn to Bill's calm and collected demeanor. Their relationship could develop as they discover they have similar views on how to use magic for the good of the wizarding world, and they become mates in both a magical and romantic sense.
There could be. The Harry Potter fandom is quite large and diverse. Some fans might see potential in a relationship between Bill and Hermione and write fanfictions based on that. It could be an interesting exploration of their personalities and how they might interact in different scenarios.
A fanfiction I remember is 'When Hermione Met Bill's Trouble'. Here, Bill is facing some issues with his work at Gringotts. Hermione, being the intelligent witch she is, offers her help. She uses her logic and research skills to solve the problems at the bank that Bill was unable to figure out on his own. It's a story full of mystery and the growth of their friendship.
One possible fanfiction could be 'Bill's Solace'. In this story, Hermione uses her vast knowledge and warm heart to comfort Bill after he endures a particularly difficult encounter with the dark forces. She might bring him books on magical healing, both for physical and mental wounds, and they sit together in the Burrow's garden, Hermione softly reading passages that offer hope and strength.