A fanfic with Cedric and Harry as brothers would change the Hogwarts experience for both of them. They could share a dormitory or have special family - related privileges at school. Their bond as brothers would likely make them more of a united front against the likes of Voldemort. Instead of Harry being the sole focus of Voldemort's attention, Cedric would also be in the crosshairs. This would lead to different strategies and plot developments. The Weasley family might interact with them differently too, as they would be related to Harry in a different way. And the relationship between Harry and Cho Chang (who was Cedric's girlfriend) would be completely reimagined, adding a whole new layer of complexity to the story.
Well, a 'Harry raised by Andromeda' fanfic can completely transform the original story's plot. Andromeda, being a Black, has her own connections and knowledge of the wizarding world. She can introduce Harry to different aspects of magic and magical families that he might not have known otherwise. His growth as a wizard is different. He may not rely as much on his friends for emotional support as he gets it all at home. This can change the dynamics of his friendships at Hogwarts. Also, in the battle against Voldemort, Harry may have different resources and allies due to Andromeda's influence.
Well, in 'Dark Lord Harry Potter fanfic', the most obvious change is Harry's alignment. Instead of being the hero, he becomes the villain or at least an anti - hero. This completely flips the moral compass of the story.
It changes the family dynamic. Instead of being an only child, Harry now has a sister, which means there's more family support or potential family drama. For instance, the sister could be a target of Voldemort too, adding another layer of danger.
They might become closer friends. Cedric could be grateful to Harry for trying to save him during the Triwizard Tournament, and Harry would be glad that Cedric survived. They could start sharing their experiences and knowledge about magic more often, and perhaps even train together to become better wizards.
Well, it could completely disrupt the relationships. For instance, his friendship with Ron and Hermione might be strained as they try to convince him to stay. This is different from the original where they are all united in their Hogwarts experience.
It changes it a great deal. For one, Harry's physical abilities are different. Instead of relying on his sight for things like Quidditch, he has to find other ways to participate or may not be able to at all. His relationships also shift. His friends might be more protective or he might be more independent in some ways.
It changes it a great deal. In the original, Harry is a normal wizard with a mortal lifespan. In 'immortal harry fanfic', he can outlive all his friends and family. This means new emotional struggles as he has to deal with loss in a different way. He also has more time to master magic, so his power levels could be off the charts compared to the original story.
In 'genderbent Harry Potter fanfic', the change in Harry's gender can significantly alter relationships. For example, romantic relationships might be different. If Harry is a girl, her relationship with Ginny would not be a romantic one as in the original. Also, the way other characters interact with Harry could change. Teachers might treat a female Harry differently in terms of expectations and discipline. The overall tone of the story can also shift, perhaps becoming more about female empowerment in a magical world.
The 'harry potter as a girl fanfic' changes the original story in multiple ways. First, the female protagonist might have different strengths and weaknesses compared to Harry. Maybe she is more skilled at potions but less confident in Defense Against the Dark Arts at first. Second, the way she deals with the mystery of the Chamber of Secrets could be completely new. Instead of following Harry's path, she might use her own wits and the help of different characters. Third, her role in the final battle against Voldemort could be more about strategy and less about brute force, which would rewrite that part of the story.
The fanfiction might change the plot in terms of Harry's relationships. Maybe his new ability with the Nuibari makes some of his friends jealous or in awe of him. Also, it could attract the attention of new characters or factions who are interested in the Nuibari. This could create new alliances or rivalries for Harry. For example, some dark wizards might want to steal the Nuibari from him, leading to new conflicts. And in his journey to master the Nuibari, he might have to visit new places or seek help from unexpected sources, thus diverging from the original plot.