One plot idea could be that Fleur starts off subtly trying to befriend Hermione. She might invite Hermione to various Beauxbatons events under the pretense of cultural exchange. Then, as time goes on, Fleur becomes more possessive, getting jealous when Hermione spends time with Harry or Ron. Another idea is that Fleur discovers Hermione's unique magical abilities and wants to keep her close to learn from her and also have her all to herself. Maybe she tries to isolate Hermione from the Hogwarts crowd.
In the fanfiction, Fleur could use her Veela charm in a positive way to create a sense of mystery and allure for Hermione. But instead of it being a controlling charm, it could be something that just makes Hermione curious about Fleur. Fleur could then take Hermione on adventures, like exploring hidden magical places. As they have these experiences together, their relationship would grow. Fleur could also be vulnerable with Hermione, sharing her insecurities, which would make Hermione see her as more than just a beautiful Veela but as a real person she can connect with.
A less common but still interesting trope could be the 'time - travel' trope in relation to them. For instance, if Hermione were to go back in time and meet a younger Fleur, or vice versa. This could lead to all sorts of interesting plot developments as they interact with the past or future versions of each other and the events in the wizarding world.
You can try some popular fanfiction websites like Archive of Our Own (AO3). It has a vast collection of fanfictions, and you can search for 'Fleur and Hermione' related ones there. Just use the search bar and filter the results according to your preferences.
In fanfiction, the writers often like to play with characters' emotions. Hermione might be possessive of Fleur because she feels a sense of competition. Fleur is known for her beauty and charm, and Hermione, being a strong - willed character, doesn't want to be overshadowed by her. This possessiveness could be a form of self - preservation in the fictional world they exist in.
One great fanfiction with this theme could be 'Love's Unlikely Path'. It beautifully portrays Hermione's inner turmoil as she discovers her feelings for Fleur. The story is well - written, with vivid descriptions of their interactions and how their relationship develops over time.
There could be a fanfiction where Hermione gets tattoos during her travels after Hogwarts. She meets Fleur during one of these travels. Fleur, who has always been seen as the more glamorous one, is a bit jealous of Hermione's new edgy look. However, as they get to know each other better, they realize that their differences in appearance are just surface - level, and they become good friends. Hermione's tattoos could be a story of her adventures, and she shares these stories with Fleur.
They might have a very competitive relationship. Since both are strong - willed and talented. They could compete in things like magical duels or academic achievements. However, this competition could also strengthen their bond as they push each other to be better. And in times of danger, they would put aside their differences and protect each other like true sisters.
I'm not sure specifically if there's one with that exact title, but it's very likely. Fanfiction writers often come up with various scenarios where characters from the Harry Potter universe interact in unique ways. Maybe in this fanfic, Fleur could be initially envious of Hermione's body language that shows her intelligence and determination, and over time, she comes to admire it as a symbol of Hermione's strength.
One possible plot could be that Hermione, as a Lycan, struggles to hide her identity within the Hogwarts community. Fleur, being perceptive, might notice something off about Hermione. Maybe Hermione is afraid of being discovered and ostracized, while Fleur, having her own experiences with being different (as a Veela), tries to help Hermione come to terms with her new lycanthropy. They could form a strong bond as they both deal with the challenges of being 'other' in the wizarding world.