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.
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.
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.
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.
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.
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.
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.
She might have been shocked. Hermione is usually a composed character, but such an unexpected physical action from Fleur could have caught her off - guard, leaving her momentarily stunned.