There's a fanfic where James adopts Hermione after she has a falling out with her own family in the muggle world. This story focuses on how Hermione discovers a new kind of family in the wizarding community led by James. It shows her growth and the bond she forms with James and his friends. There are many sweet moments like when James teaches Hermione some old family magic spells.
One great 'loki adopts hermione fanfiction' is 'A Godly Adoption' where Loki takes Hermione under his wing in a world filled with magic and Norse mythology crossovers. The story is full of interesting character interactions.
There's also 'Remus's Little Hermione'. This story delves deep into how Hermione's intelligence and Remus's wisdom blend together. It details their daily life, from Hermione helping Remus with his research to Remus teaching Hermione some advanced magic. Their relationship evolves beautifully in this fic.
There's 'Sirius's Little Witch'. This fanfiction focuses on how Hermione's intelligence and Sirius's rebellious nature work together. Sirius provides Hermione with a different perspective on magic, one that's not always taught in the books at Hogwarts. The story is full of little adventures they go on together around the wizarding world.
It's interesting because it combines two beloved characters from different generations. James, from the older generation, and Hermione, from Harry's generation. It creates a unique dynamic as James can pass on his knowledge and wisdom to Hermione.
I also recommend 'Adopted by Harry'. This fanfiction focuses on the impact of Hermione's new family situation on her Hogwarts life. It's quite heartwarming to see how Harry tries to give Hermione the family she never had and how she blossoms in this new environment.
There's also 'Adopted by the Sannin'. Here, Naruto is adopted by one of the Sannin. Each chapter explores different aspects of his growth under their tutelage, and how his relationship with the other Sannin and the village also evolves. It's really interesting to see how Naruto's character is shaped in this alternate scenario.
One possible plotline could be Hermione using her intelligence to create a stable and loving home environment for Harry. Maybe she helps him deal with his PTSD from his past traumas. Another could be them facing magical threats together as a family, with Hermione teaching Harry new spells and ways to protect himself.
One interesting plotline could be Hermione's struggle to adjust to living with Snape. She's used to the warm and inclusive environment of Gryffindor, and Snape's dark and brooding personality makes it a big change for her. Another could be Snape seeing Hermione's potential not just as a student but as a daughter figure, and he starts to teach her advanced magic privately, which in turn helps Hermione to solve some of the school's mysteries.
In some fanfictions, the plotline might involve a time - turner related incident. Maybe Hermione gets into some sort of trouble with time - traveling that only McGonagall can help her with. As a result, McGonagall adopts her to keep a closer eye on her and make sure she doesn't get into more dangerous situations. This could lead to some really interesting scenes where McGonagall teaches Hermione more advanced magic and Hermione uses her knowledge in new and creative ways under McGonagall's guidance.
A good plot could be them trying to solve the mystery of their parents' past. Since Hermione is a Muggle - born in the original story, this fanfiction could rewrite her backstory to be related to James. They could find out that their parents were involved in some sort of secret magical society that was disbanded years ago, and now they are facing threats from remnants of that society. Another plot might be that they both have a special connection to a magical creature. For example, they discover that they can communicate with a Phoenix that has been guiding their family for generations. They then have to protect the Phoenix from dark wizards who want to use its powers for evil.