In one fanfiction concept, Hermione's tattoos are a secret she keeps from most people. But Fleur notices something odd about Hermione's behavior when it comes to showing skin. Eventually, Fleur confronts Hermione, and Hermione reveals her tattoos. They are all related to her memories at Hogwarts, like a tattoo of the Gryffindor lion. Fleur is touched by the sentiment behind the tattoos and they become even better friends.
Perhaps in the fanfiction, Hermione has a set of tattoos that are in a magical language. Fleur, being from a different magical culture, tries to decipher them. As she does, she and Hermione grow closer, sharing their different perspectives on magic. The tattoos could be a mystery that brings them together, and as they solve it, they form a strong bond.
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.
Another possibility is that Fleur, in a bid to gain more influence in the magical world, uses Hermione's research on some ancient magic without permission. When Hermione finds out, she realizes Fleur has been using her all along, and this is the ultimate betrayal. Hermione then has to find a way to expose Fleur's actions and clear her own name.
One idea could be a story where Fleur tries to subtly show her feelings to Hermione through acts of kindness, like leaving her little gifts. It could start with Fleur realizing her crush when she sees Hermione's intelligence during a study session in the library.
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.
Often, in fanfictions, the development of their relationship is a slow - burn process. It could begin with simple exchanges of knowledge. Hermione might teach Fleur some complex magic theories, while Fleur could show Hermione some unique Beauxbatons magic. As they get to know each other better, they might start to have deeper emotional connections. Small gestures like helping each other in times of need or sharing secrets could lead to a more intimate relationship.
I'm not sure if there is such a specific fanfiction. There are a vast number of fanfictions in the Harry Potter fandom, and while many explore unique relationships and scenarios, the idea of Hermione being Fleur's pet seems rather unusual and might not be a common trope. However, it's possible that some creative writer out there has come up with such a concept.
Hermione could react by using her intelligence to expose Fleur's betrayal. She might start gathering evidence of what Fleur has done wrong and present it to their mutual friends or to an authority figure in the wizarding world.
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.
Well, it could develop into a story of deep friendship. Maybe Fleur was trying to comfort Hermione during a difficult time. They might start sharing their secrets and fears, and through this physical closeness, a strong bond of sisterhood could form.