They change the relationships. For example, if Harry is betrothed to someone not in the original relationships, it alters the love triangle or friendship dynamics. So, instead of the normal Ron - Hermione - Harry dynamic, a new relationship takes center stage.
The 'Harry Potter betrothed fanfic' often adds new plotlines related to the betrothal. There might be a whole new set of challenges like magical contracts or family feuds that were not in the original story. This changes the overall flow and focus of the story from the original adventures at Hogwarts to more relationship - centered and betrothal - related plots.
The 'Harry Potter Stockholm Syndrome fanfic' can change the original story quite drastically. First, the power dynamics are completely flipped. In the original, there is a clear line between the good guys and the bad guys. But in these fanfics, the boundaries are blurred as a character may start to identify with their captor. Also, the relationships between characters are distorted. Instead of the loving friendships and family bonds, we get these complex and often uncomfortable relationships. Moreover, the overall message of the story shifts from one of hope and courage to a more muddled exploration of abnormal psychological states, which is a far cry from the original 'Harry Potter' essence.
Slytherin Harry Potter fanfics often change the sorting, which is a huge alteration to the original story. For example, in the original, Harry is a Gryffindor, but in these fanfics, being in Slytherin means he has different relationships. He may befriend Slytherins who were originally antagonists in the main 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.
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.
The 'Harry betrothed to Lestrange' concept completely rewrites the future of the wizarding world in fanfiction. It can lead to different political alignments. The Ministry of Magic might have to reevaluate how they deal with Harry and the Lestranges. It could also affect the education system at Hogwarts. For example, there might be new classes or teachings related to the Lestrange family's magical practices that Harry brings to light. And of course, it changes the romantic aspect of Harry's life, from his potential relationships with Ginny or others to this new, complex relationship with a Lestrange.
These fanfictions can greatly alter the original storylines in multiple ways. One way is by changing the character development. Harry might become more confident in a different way or Hermione could have a different set of skills. Another way is through the plot structure. Maybe the Triwizard Tournament doesn't happen as it did in the original, but instead, there's a new competition that Harry and Hermione are forced to enter together. And of course, the relationships between other characters can be adjusted too. For example, Ron's role might be diminished or changed completely in some of these fanfictions.
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.
They can change the original plot by altering Naruto's relationships. For example, if he's reincarnated as a different character, he might form new friendships or rivalries. His reincarnation could also lead to different power developments. Instead of following the same path to gain his powers, he might have to find new ways in his reincarnated form.
The 'Harry Potter reading the multiverse fanfic' concept completely shakes up the original story. Harry is used to the relatively stable and well - defined world of Hogwarts and the wizarding world in general. But when he starts exploring the multiverse, everything he thought he knew is challenged. His understanding of good and evil, for example, might be redefined. In the original story, Voldemort was the main evil, but in the multiverse, there could be far more complex and nuanced forms of evil. Also, the way magic works in different universes could make him question the very foundation of his own magical education. This would not only change his own character arc but also potentially the fates of the characters around him as he brings back new ideas and powers from the multiverse.