A possible plot is that Hermione is cursed by a jealous Slytherin student to be a cat. As a cat, she experiences the prejudice that non - human magical creatures face in the wizarding world. She teams up with Crookshanks, her own cat, who seems to understand her situation. Together, they try to find the antidote while also dealing with the chaos that Hermione's disappearance (in human form) causes at Hogwarts. This could lead to some heartwarming moments between Hermione and Crookshanks as they bond in a new way.
Perhaps Hermione is transformed into a cat during a Quidditch match when a stray spell hits her. In her cat form, she realizes she can move much faster and stealthily. She uses this to her advantage to explore hidden parts of Hogwarts that she couldn't access before. She might find an old, forgotten magical artifact that has some connection to the history of the school. Meanwhile, her friends are desperately looking for her, not knowing she's just a cat on an adventure around the castle.
Well, a plot might be that Hermione is deaged due to a magical accident in the library. As a deaged Hermione, she has a different view on things. She might start to question the rules of Hogwarts more, as she doesn't have the same level of respect for them as her older self. Her friends, Harry and Ron, would have to deal with this new, more rebellious Hermione while also trying to figure out how to reverse the deaging spell. This could cause a lot of chaos in Hogwarts.
One plot idea could be Hermione helping Hagrid with a new magical creature he discovers. Maybe it's a creature that has unique abilities and Hermione uses her extensive knowledge from books to figure out how to take care of it.
One plot idea could be that Hermione, through some magical accident, ends up in the Asgardian realm. Thor then has to help her get back home while she uses her magic to solve various problems in Asgard, like dealing with a mysterious magical threat that the Asgardians' magic can't handle.
Perhaps there could be a time - travel plot where Hermione and Percy are sent back in time together. They have to rely on each other to get back to their own time. During this adventure, they see different sides of each other. Percy sees Hermione's quick thinking in a completely different context, and Hermione sees Percy's loyalty to his family and friends in a new light, which could lead to a romantic relationship.
One plot idea could be that Rose discovers an old spellbook that Hermione once used and tries to follow in her footsteps. This leads to her getting into some tricky situations where Hermione has to step in and guide her, like when Rose accidentally summons a mischievous magical creature. Another could be a time - travel plot where Rose and Hermione go back in time to witness a significant event in wizarding history together and have to make sure they don't disrupt the timeline too much. A third idea is that they team up to solve a mystery in Hogwarts that involves a new, unknown type of magic that is causing strange things to happen around the school.
A third idea is that Blaise and Hermione are chosen to represent Hogwarts in an inter - magical school competition. They have to train together and overcome their differences. As they face challenges in the competition, they realize their mutual respect and admiration for each other's skills, which gradually turns into a romantic relationship.
One plot idea could be that Bellatrix, in an alternate reality, has a change of heart and decides to protect Hermione from other dark forces. Maybe she sees a bit of herself in Hermione's fierce determination. Another could be that Hermione, while researching dark magic for a school project, accidentally stumbles upon a long - forgotten connection between her family and Bellatrix's, leading to a strange alliance. And a third idea might be that Bellatrix is cursed and Hermione is the only one who can break the curse, but in the process, they have to face their deep - seated prejudices about each other.
One plot idea could be that Hermione discovers a long - lost spellbook of Salazar Slytherin. As she delves into it, she starts to understand his view of magic in a new way. Maybe the spells in the book are different from what she has learned before, and she has to struggle with whether to use them or not, given Slytherin's somewhat dark reputation.
A possible plot idea is that in an alternate universe, the wizarding world has different alliances. Hermione and Abraxas meet at a magical symposium where they are both presenting on different forms of magic. They initially clash but then realize they have more in common than they thought. Or perhaps there is a mystery that only their combined skills can solve. Maybe a dark magic artifact that is related to both Gryffindor and Slytherin, and they must put aside their differences to stop its power from being misused.
One plot idea could be that Hermione loses her sight due to a dark magic spell during a battle. She then has to rely on her other senses and her friends' help more than ever. For example, Harry and Ron could describe the magical texts to her so she can still study and find a way to reverse the spell. Another idea is that she's born blind in this fanfiction universe, but she still manages to excel at Hogwarts by using her extraordinary memory and auditory learning skills.