In some fanfictions, the older brother could be an outcast from the wizarding world due to a misunderstood magical ability. He then takes Harry under his wing and shows him a different side of magic, one that is not taught at Hogwarts. They might go on adventures together outside of the school, exploring ancient and forgotten magical places, and in the process, the older brother helps Harry become a more well - rounded wizard.
In this type of fanfiction, a possible plot is that the Death Eaters and the Order of the Phoenix members are forced to live together in a 'Big Brother' style house. They have to follow certain rules set by the magic of the house. There are tasks related to both dark and light magic. The characters have to balance their own beliefs and goals while also trying to win the overall competition. This creates a lot of tension and interesting character interactions as they all have very different motives.
Well, he could be more independent and decide to explore the Forbidden Forest on his own more often. He might discover new magical creatures that were previously unknown to Hogwarts students. This could lead to him getting into trouble with the teachers, but also make him a bit of a hero among his peers.
Well, there could be a story where an older witch who was once a friend of Lily Potter returns to the wizarding world after years of self - exile and becomes like a surrogate mother to Harry. Or a fanfiction where an older female character who was part of an ancient magical order teaches Harry about some forgotten magic that could be useful in his fight against the dark forces. Also, a story about an older Hogwarts house - elf who has been around for generations and gives Harry some unique insights into Hogwarts' hidden secrets.
Well, with Harry being three years older, perhaps he has already mastered some more advanced magic. In the fanfiction, this could lead to a different dynamic with his professors. For example, Snape might be more grudgingly respectful of his skills. Also, his relationship with Ginny could develop much sooner. They could be a power couple within Hogwarts, fighting side - by - side against the Death Eaters and helping to protect the school and the wizarding world in new and exciting ways.
In this fanfiction, the older brother of the Boy - Who - Lived (BWL) might have a very different relationship with the wizarding world. He could be an outcast because he is overshadowed by his younger brother's fame. So, he might decide to create his own path, away from the typical Hogwarts hero - worship. But when danger really comes to Harry, he steps up. He might have some knowledge about the dark arts that he uses to fight the enemies in a more unorthodox way compared to Dumbledore's side.
A great plot for a Potter Manor fanfiction could involve a mystery that surrounds the manor. For instance, strange noises at night lead Harry to uncover a long - forgotten chamber. It could also be about Harry restoring the manor to its former glory, perhaps with the help of Hermione's research on ancient magic used in the construction of such manors.
A cool plot could be that they are brought together by a prophecy. Percy's skills with water and Harry's magic would be combined to defeat an ancient evil. They might start by being suspicious of each other, but as they learn about their shared heritage, they grow closer. Also, there could be a plot where they have to deal with the politics of both their worlds. How would the wizards react to the existence of demigods and vice versa? This could lead to some really interesting character interactions and story developments.
One interesting plot idea could be exploring what would happen if Harry had a different upbringing, like being raised by the Malfoys. It would completely change his view of the wizarding world and his relationships. Another idea might be a time - travel fanfic where Harry goes back to the Marauders' era and interacts with his parents and their friends. This could lead to him preventing certain tragedies or changing the future in unexpected ways. And then there's the concept of a fanfic where the roles are reversed, and Voldemort is the one trying to protect the wizarding world from a greater evil, with Harry being the main antagonist.
A traveler could be from a different magical realm entirely and come to the Harry Potter universe. They bring with them unique magical abilities that both fascinate and frighten the wizards in the Harry Potter world. This could lead to a series of adventures where they either share their knowledge or are hunted down by those who fear the new magic they possess.
One idea could be that Hecate, being the goddess of magic, takes Harry Potter under her wing secretly to teach him ancient and powerful magic that Dumbledore doesn't know. This could lead to Harry having new abilities to fight Voldemort.