What could be the plot in a 'Harry Potter and His Little Sister' fanfiction?

One possible plot could be that Lemon discovers she has a special magical ability that is different from Harry's. For example, she might be able to communicate with magical creatures in a unique way. Harry then has to protect her from those who might want to use her ability for bad purposes.

Voldemort's remaining followers could be antagonists. They might target Harry's little sister thinking they can use her to get to Harry. They could try to kidnap her or use dark magic on her.

Well, perhaps in the fanfiction, Harry's little sister has some unique magical ability that attracts unwanted attention. Harry then has to raise her while constantly fending off those who would use her for their own purposes. He would have to balance being a brother and a protector, making sure she grows up happy and safe in a rather dangerous magical environment. He might also introduce her to his friends at Hogwarts for support and guidance as she gets older.

One possibility is that Harry discovers a long - lost sister and takes on the role of a protector. He might teach her magic in secret, away from the prying eyes of the wizarding world authorities. Maybe they live in a hidden cottage and he passes on the skills he learned at Hogwarts to her.

The sister might have her own group of friends in the wizarding world. When she takes in Harry, she brings him into this circle. They all contribute to his upbringing. For example, one friend could be a potions expert and teach Harry about potions in a fun way. Another could be a great dueler and train Harry in combat magic. His sister coordinates all this, ensuring Harry gets a well - rounded magical education and a loving family environment.

One possible plot could be that Lemon and Harry discover some long - hidden family secrets together. Maybe they find out about a special power that runs in their family that Voldemort is also interested in. So they have to race against time to master this power and keep it out of Voldemort's hands.

It could also be that Harry and Lemon inherit an old family heirloom that has some sort of magical power. But they don't know how to control it at first. So they embark on a journey to find out more about it, meeting various interesting characters along the way, and in the end, they learn to master the power and use it for good.

Well, it could be that the sister was kidnapped by dark wizards when she was a baby. Years later, Harry discovers some mysterious clues that lead him to believe she might still be alive. He then embarks on a dangerous journey to find her, facing many magical obstacles along the way.

Another idea is that Harry, already being a hero, has to teach his sister all about the wizarding world. He shows her Hogwarts, but they face challenges like some students being jealous of her relation to Harry. They go on adventures in the Forbidden Forest together, and Harry imparts his wisdom and courage to her.

One possible reason could be jealousy. Maybe the sister is getting more attention from their parents or at Hogwarts. For example, if she is a star student and Harry feels overshadowed.