One possibility could be that Harry and Hermione start a magical research project together. They explore some long - forgotten spells and their implications in the wizarding world. Maybe they discover a new way to use magic that could change the way magic is taught at Hogwarts.
Perhaps in this fanfic, Harry and Hermione travel the world to help magical creatures that are in danger. They use their combined knowledge and skills. Hermione's vast book - learning and Harry's practical experience in facing danger make them a formidable duo. They might even find a new species of magical creature during their travels.
There might also be other characters from the original series making appearances. For example, Neville could show up as a respected Herbology teacher at Hogwarts. His character development from a shy boy to a brave hero could be referenced, and he could interact with Harry and Hermione in the context of the fanfic, perhaps helping them with some plant - related magic or knowledge in their adventures.
One possible plot could be that Hermione and Harry discover a magical cat that has the ability to communicate with them. This cat leads them on an adventure to find a hidden magical artifact. Along the way, they use their knowledge and skills to overcome obstacles.
It could be that she wants to explore different interpretations of the story's end. Fanfictions often offer new perspectives.
One possible plot could be that Harry and Hermione somehow end up in Westeros through a magical portal. They might use their magic skills from the wizarding world to deal with the political intrigue in Westeros. For example, they could help a certain house in the Game of Thrones - like scenario, using spells to protect their allies or uncover the secrets of their enemies.
There's also 'A New Beginning'. In this fanfiction, Harry and Hermione start a magical research project together. It details their adventures in exploring new spells and magical theories, all while still being the best of friends and supporting each other in their personal growth.
Maybe they live together as part of a witness protection - like situation in the wizarding world. Some powerful and dangerous wizard is after them, so they have to stay together in a hidden, magically protected house. They learn to live with each other's quirks, like Harry's impulsive heroics and Hermione's strict study schedules, and in the process, they strengthen their friendship even more.
In a 'Harry and Hermione run away fanfic', they could be running away from the pressure of their pre - destined roles. Harry is always seen as the 'Chosen One' and Hermione as the brilliant sidekick. Fed up with these expectations, they decide to run away and explore the wizarding world on their own terms. They might travel to different wizarding schools across the globe, learning new spells and making new friends outside of Hogwarts.
One possible plot could be that Harry and Hermione travel the wizarding world together, documenting all the post - war changes. They might visit Hogwarts, which is being rebuilt, and help in the restoration process, reminiscing about their old school days as they do so.
Well, perhaps the ritual is related to enhancing their magical abilities. Harry might be providing moral support and practical help like gathering rare ingredients for Hermione. Maybe they need to perform the ritual to protect Hogwarts from a new dark threat.
Perhaps the toy is a little magical animal figurine that can move and talk, and it's designed to keep Hermione company during her long hours in the library. Harry might have made it as a way to make her smile during her stressful study times. He could have spent a lot of time researching spells and materials to create something truly special for her.