It could also be that the Potters are under some sort of magical influence or curse. In the fan fiction world, there could be a dark force at play that makes them see the twins as more important. This force might be manipulating their emotions and perception, leading to the neglect of Harry.
Perhaps there's a plot against Harry by some dark forces, and the Potters believe that only they can protect him properly. They might think that the people who have been taking care of Harry so far are not equipped to handle the new and more dangerous threats. Also, it could be that the afterlife in the wizarding world has some rules or opportunities that allow them to try and get Harry back into their family fold. They could have been given a second chance, so to speak, and are eager to take it.
Harry might become withdrawn and introverted. Feeling unloved and unwanted, he could start to keep to himself more, spending time alone in his room or exploring the grounds of their home alone, trying to make sense of why his parents seem to favor the twins.
One common theme is self - discovery. Female potters often start out not fully aware of their powers or potential, and the story is about them finding out who they really are. For example, they might learn about their family history that has been hidden from them and realize their true place in the wizarding world.
One common theme is redemption. Since the Potters are given a second chance, they often seek to right the wrongs they couldn't before. Another theme is family. Their return means reuniting with family members and strengthening those bonds.
One possible motive could be that the Potters discovered some dark plot by the Malfoys involving Harry. Maybe they found out that the Malfoys were planning to indoctrinate Harry into their pure - blood supremacist ideology against his will. So, to protect Harry from that, they kidnapped him.
Another possibility is that Harry could find a hidden diary of his parents. The diary could contain their thoughts, experiences at Hogwarts, and even some secrets about the wizarding world that they were involved in. It would give Harry a more personal connection to his parents and their lives before him.
A theme that is often explored is the idea of legacy. The Potter family has a great legacy, and Ginny's interaction with them can bring out how she fits into that magical world's history and future. Also, love and romance can be a part of it, as relationships might develop between Ginny and some of the Potter family members or their friends.
There's also 'The Female Potter and the Lost Artifact'. In this fanfiction, the female Potter is on a quest to find a powerful and long - lost magical artifact. Along the way, she has to face many challenges and make new friends in the magical world. It's really exciting as it combines elements of adventure, magic, and friendship.