The story could develop in a way that Harry goes through a period of self - discovery. Without the Gryffindor identity, he has to re - evaluate who he is. He might explore different kinds of magic that Gryffindor house never encouraged. This exploration could lead him to new powers and a new understanding of the wizarding world.
The story may take a turn where Harry becomes a sort of mediator between the houses. Since he has left Gryffindor, he has a different view and can help bridge the gaps between the different groups in Hogwarts. He might also embark on a personal journey of self - discovery outside the framework of Gryffindor values, which could lead to new magical abilities or insights.
After leaving Gryffindor, Harry may embark on a journey of self - discovery. He could travel to different places, learn new magic, and meet new characters outside of the Gryffindor - centric environment. This new path could lead him to discover a new purpose or a new way to fight against the forces of evil that doesn't rely on the Gryffindor identity.
The dynamics within Gryffindor would be greatly affected. His friends like Ron and Hermione would be confused and sad. The Gryffindor house would lose one of its most iconic members, and there might be a power shift within the house. Other Gryffindors might feel less confident without Harry around.
There could be a new character introduced who helps Harry get over Ginny. This new character could be a friend or a potential love interest. Meanwhile, Ginny might face her own challenges in her new life, like dealing with the guilt of leaving Harry or facing some new enemies. As the story progresses, there could be a possibility of them reconciling or moving on completely from each other, depending on the direction the fanfiction author wants to take.
Often, Harry has to take on the role of a single father. He might struggle at first with taking care of the kids all by himself. He could become more overprotective or, on the other hand, be a bit lost in the day - to - day tasks. The kids might also start to act out, missing their mother.
Perhaps he leaves Gryffindor in fanfiction because he is influenced by a new mentor or friend who is from a different house or group. This person might convince him that he can achieve more or be more true to himself outside of Gryffindor. Also, it could be due to a prophecy or a special mission that requires him to distance himself from Gryffindor for a while to protect the house or the entire Hogwarts from a certain threat.
In some cases, the story might focus on Hermione's journey after leaving. She could end up in a new and strange part of the wizarding world, meet different characters, and learn new magic. Meanwhile, Harry might be on a quest to find her and in the process, uncover secrets about the wizarding world that they never knew before. This can lead to a reunion later on, but with both of them changed by their experiences.
Well, it might show Harry on a journey of self - reliance. He could be traveling alone, facing new challenges outside of the school's protective bubble. Maybe he meets new allies who help him understand the bigger picture of the magical world that Hogwarts had shielded him from.
The story may split into different plotlines. Harry's journey on his own could lead him to new allies and enemies. He might face challenges that change his character in ways different from when he was with the Golden Trio. Meanwhile, Hermione and Ron could be dealing with threats in Hogwarts or the wizarding world that they have to handle without Harry. As the story progresses, there could be a build - up to a reunion, which is often a very emotional and significant moment in the fanfiction.
One possible reason could be a misunderstanding with his friends in Gryffindor. Maybe there was a big argument over something like a Quidditch match strategy that made him feel alienated.