It might make his relationships more interesting. If he reads fanfiction that has unique takes on his friendships, like a story that shows a deeper bond between him and Hermione, he could be more conscious of those relationships in real life and try to strengthen them further.
Reading fanfiction could expand his social circle in a way. He might meet other fans of the fanfiction he reads, and they could bond over their shared love for these alternative interpretations of the Harry Potter world. This could introduce him to new people with different views on the story and its characters, which in turn could have an impact on how he interacts with his existing friends, as he brings in new ideas and perspectives from these new acquaintances.
If Harry is sleepwalking, it might worry his friends. For example, Hermione would probably be very concerned and try to find a way to stop it. This could strengthen their friendship as she devotes time to helping him. Ron, on the other hand, might initially find it funny but then also realize the seriousness. It could also make some of his classmates more curious about him, which could either bring them closer or create some distance depending on how they react to his sleepwalking episodes.
Some might find it charming. For example, his friends like Ron and Hermione might see it as just another part of Harry's unique personality. It could make him seem more approachable to those who are drawn to his non - conformist ways.
Well, it could enhance his friendships. For example, he'd be able to tell when Ron or Hermione were feeling down and offer immediate comfort. It might also make his enemies more wary of him, as he could sense their malicious intents. He could use this ability to his advantage in the wizarding battles, being able to anticipate his opponents' moves based on their emotions.
The transformation of Harry Potter into a werewolf in the fanfiction could have a huge effect on his relationships. His enemies might use it against him, and his allies might have to work harder to protect him. Also, it could change how he sees himself and how he interacts with the magical world as a whole.
His jealousy might make him a bit withdrawn from Bill. He could be less friendly and more distant, which could cause some tension between them. As for his relationship with Fleur, he might act a bit awkward around her, not really knowing how to handle his feelings.
In this fanfiction scenario, Harry's relationship with Dumbledore could be very interesting. Dumbledore would surely be aware of the significance of Excalibur. He might take Harry under his wing even more, guiding him on how to use the sword's power for good. Harry's relationship with the other Hogwarts students could also change. Some might look up to him even more, while others might fear him because of the great power he now wields.
His relationship with Dumbledore could become more complex. Dumbledore knew Sirius well, and if Harry starts emulating Sirius' more impulsive side, Dumbledore might have to be more hands - on in guiding Harry. On the other hand, among the other Gryffindors, Harry could become a sort of leader figure. Since Sirius was a popular and respected Gryffindor in his time, Harry acting like him could inspire his housemates and lead to more group activities and a stronger sense of unity within Gryffindor.
Well, his relationship with the professors could be affected too. Professor McGonagall might be a bit surprised but ultimately respect his choice as long as it doesn't disrupt the learning environment. Snape, on the other hand, might use it as an excuse to give him a hard time. But with Dumbledore, Dumbledore would probably see it as just another aspect of Harry's growth and individuality. And it could also make Harry more relatable to the younger students who are often trying to find their own identities.
His lack of trust would surely strain his friendships. His friends might feel hurt and rejected by his constant suspicion. For example, Hermione, who has always been loyal to him, might be deeply disappointed if Harry doesn't trust her.
With his friends, it could initially cause confusion. They are so used to calling him Harry that the new name might be a bit of a shock. But if they understand his reasons, they would likely support him. For example, Hermione might be the first to adapt and help others adjust, using her logical thinking to see the benefits of the name change.