The plot could shift towards Harry becoming more independent. He might start making his own decisions without considering Dumbledore's influence, which could lead to him taking more risks or approaching problems in a completely different way than before.
If Harry has had enough of Dumbledore, he may distance himself from the Order of Phoenix or other groups associated with Dumbledore. This could create new alliances for Harry. For instance, he might team up with some of the more marginalized characters in the wizarding world who also have issues with Dumbledore's methods. This would introduce a whole new dynamic to the fanfiction plot.
The plot would likely become more centered around Harry's self - discovery and his journey to find his own path. Without Dumbledore's over - shadowing presence, Harry could explore different aspects of magic, make new friends, and face his enemies in a more direct and personal way. It might also lead to a re - evaluation of the whole good - vs - evil concept in the fanfiction, as Dumbledore was often seen as a symbol of the 'good side' and Harry's break from him could blur those lines.
The relationship might turn into one where Harry has to constantly remind Dumbledore of who he is and their shared experiences. Dumbledore, in his senile state, could forget important things about Harry like his role in the fight against Voldemort. Harry would then have to patiently re - introduce himself and the situation. This could be frustrating for Harry at times, but it could also deepen his understanding of Dumbledore as a more human and fallible figure.
It might make Harry more confident. With Dumbledore's training, Harry gains more knowledge and skills, which gives him the confidence to face challenges.
One reason could be that in some fanfictions, Dumbledore's character might be over - idealized or his actions overly scrutinized in ways that make Harry seem secondary. Harry might be tired of always being in Dumbledore's shadow or having Dumbledore's decisions dictating his life even in the fan - created stories.
Well, it can change the plot significantly. For starters, she might not follow Dumbledore's instructions blindly. Instead of going on quests or facing challenges that Dumbledore sets for her, she could rebel and take her own path. This could lead to her allying with different characters, perhaps those who are also against Dumbledore's ways. For example, she could team up with some of the more rebellious Slytherins who have their own issues with Dumbledore's leadership at Hogwarts.
At first, Dumbledore might see Harry as an even greater threat. But as he delves deeper, he could realize that Harry has the potential to be a powerful force for good, despite his dark lineage. So, Dumbledore would start to mentor Harry in a different way, focusing more on helping him come to terms with his identity and use it for positive change.
Perhaps he would distance himself from the wizarding world's fanfiction community. He'd focus more on his own life and the real events and relationships in the wizarding world, rather than the fictionalized versions in fanfiction. This could lead to him exploring new aspects of magic or making new friends outside of the fanfiction - obsessed crowd.
The plot would change a great deal. For one, Harry would be much more powerful physically. So when facing Voldemort, he could use Thor's strength in combat, not just rely on magic. He might be able to take on Death Eaters more easily.
Dumbledore might be more guarded around Harry. He would be aware of the potential danger if Harry were to embrace the darker aspects of Salazar's legacy. He would still try to guide Harry, but there would be a new layer of caution.
If Harry Potter had a sister in fanfiction, it could completely shift the dynamic of his relationships. She might be more popular or less so than Harry, which would affect how people interact with them both. Also, she could be the target of Voldemort as well, or perhaps Voldemort would try to use her against Harry. This would add another layer of danger and complexity to the story. And if she was friends with different characters, like being really close to Hermione before Harry was, it would change the way the trio formed.
In terms of the overall plot, it can take a completely different turn. Instead of Dumbledore having a master plan to defeat Voldemort, it might be up to the younger characters to figure out everything from scratch. This makes the fanfiction more of a coming - of - age story where the kids have to face the ultimate evil without the safety net of a competent Dumbledore.