Another concept could be that Hermione is the Chosen One in an alternate universe. In this universe, the events that led to Harry being the Chosen One in the original story didn't occur. Hermione is then tasked with uniting the wizarding world against a common enemy. She uses her intelligence and knowledge of magic to form alliances and strategies that no one else could think of.
In a fanfiction, Hermione could be the Chosen One because of her unique magical abilities that were overlooked before. For example, her aptitude for time - turning could be a sign of a much greater power. She might be the key to defeating a new dark wizard who is threatening the wizarding world. This would put her in the center of the action and change the dynamics of the story, as she would be the main target and the main hope.
One idea could be Hermione discovers she's the Chosen One when she stumbles upon an ancient prophecy in the restricted section of the library. This prophecy was hidden away for centuries and she realizes it speaks of her. She then has to face a series of trials alone, without the support of Harry or Ron at first, as they are skeptical. This could lead to her growth as a character and show her independent strength.
A really interesting plot could be Hermione being the Chosen One and having to deal with the jealousy and disbelief of her peers. Some might think she's faking it or that she's not worthy. This internal struggle within the wizarding community could add a lot of drama to the fanfiction. Also, it could lead to her proving herself in unexpected ways.
Another possibility is that Hawkeye is on a mission in a world where magic exists on the fringes. He meets Hermione, who is researching ancient magical artifacts that could have an impact on the Muggle world. They start off distrustful of each other but as they learn more about their respective worlds, they form a bond and work together to protect both worlds from a common enemy.
If Hermione was the chosen one in fanfiction, it could lead to a whole new exploration of her character. Maybe she'd discover hidden powers or form unexpected alliances that would shape the course of the story in exciting ways.
One idea could be that Hermione turns into a centaur as a result of a misfired spell during a Defense Against the Dark Arts class. She could then struggle to adapt to her new form, having to deal with the physical differences like running on four legs and having a horse - like body. Meanwhile, her friends Harry and Ron would be trying to find a way to reverse the spell.
One idea could be a crossover where Jasper Hale, with his vampire abilities, senses Hermione's powerful magic. They meet when the Cullens move to the UK for some reason. Jasper is intrigued by Hermione's intelligence and her ability to handle complex situations. They start to form an unlikely friendship which gradually turns into a deeper relationship as they learn more about each other's worlds.
Well, it really depends on the author's take. Some fanfic writers might show Hermione as the Chosen One by giving her a unique magical ability that sets her apart. Maybe she has a special connection to an ancient magic source. This then leads her on a journey where she has to learn to control and use this power for the greater good. In these stories, she might also face a lot of skepticism from the wizarding community at first, as they are used to the idea of a male Chosen One, like Harry. But she gradually proves herself through her deeds.
One great pairing for Hermione Granger in crossover fanfiction could be with Doctor Strange. Their intelligence levels are quite high. Hermione's magical knowledge combined with Strange's mastery of the mystic arts would make for an interesting dynamic. They could solve complex magical - mystical problems together.
One idea could be that Hermione is raised in secrecy by someone who knew Voldemort's true identity but didn't want her to follow his dark path. She discovers her true parentage through a series of mysterious events, like finding an old diary of Voldemort's that reveals secrets. Then she has to struggle with her own identity, whether to embrace the part of her that is related to Voldemort or completely reject it and continue to fight for good.
Another could be a cross - over where Hermione stumbles upon Forks while on some sort of international magical research. She meets Edward and they start to exchange knowledge about their different worlds, like Hermione teaching Edward about complex spells and Edward sharing vampire lore.
A popular idea is a post - war fanfiction where they help to rebuild the wizarding world. They could be involved in projects like restoring Hogwarts or creating new magical educational programs. This gives a chance to show their growth from students to leaders in the wizarding community.