Harry's acceptance of his destiny would make his relationships with his friends more complex. On one hand, they would be proud of him. But on the other, they would have to adapt to his new role. His friends would need to find their own places in his journey. Hermione might focus more on researching ways to help Harry fulfill his destiny, while Ron could become more of a protector, guarding Harry from distractions. This evolution in their relationships would be a crucial part of the fanfiction's story.
Perhaps he witnesses a great evil that he could have prevented if he had been more accepting of his role earlier. This guilt and the knowledge of the consequences of his inaction could drive him to accept his destiny. Or, it could be that his friends are in great danger because of his hesitation, and he decides to embrace his destiny to save them.
His character might become more self - assured. As he accepts his destiny, he gains confidence in his abilities.
His relationship with the Dursleys would surely become more strained. He would no longer tolerate their mistreatment and might even use magic to protect himself from them if they try to continue the abuse. With his friends, it could bring them closer. Hermione and Ron would be more protective of him and would try to cheer him up when he has moments of self - doubt due to the abuse he's endured.
His friends would be both amazed and a bit envious. Hermione might be very interested in studying this new aspect of magic related to his ability. Ron, on the other hand, would probably be in awe and might ask Harry to use his ability to find some cool magical animals to play with. It could also make them more protective of Harry, as his ability could attract unwanted attention from those who might want to use it for bad purposes.
His friends might be initially terrified. Hermione, for example, would be both scared and immediately start researching how to reverse it. Ron would probably be more shocked and not know how to react at first. Their friendship would be tested as they try to figure out what to do. They might have to keep Harry's transformation a secret from other students to protect him from being hunted or experimented on.
Losing his arm would be a huge blow to Harry. His friends' reactions would be mixed. Hermione would be practical, trying to find magical solutions or aids for Harry. Ron would be more emotional, showing his support through his presence. Some of his other friends might be a bit afraid or unsure at first. But over time, they would all come to accept Harry as he is now and their relationships would be based on a new level of understanding and support.
His friends would probably be initially shocked. Hermione might be a bit scared at first but then would be very interested in studying his new form. Ron would likely be in awe but also a bit jealous of Harry's new power as a dragon. Overall, their friendship would have a new dynamic as they have to adapt to Harry's different form.
His friends might be initially confused. They're used to seeing Harry's face clearly, so a mask could create a sense of distance. Hermione, for example, would probably be very curious and try to find out the reason behind it right away. Ron, on the other hand, might be more laid - back at first but would also start to worry if Harry didn't explain soon.
Telepathy likely deepens their relationships. They can understand each other on a more profound level. For instance, they can immediately know if a friend is in distress without having to say a word.
In some fanfiction concepts, he might change his soul through powerful magic spells. Maybe he discovers an ancient spell in a hidden book in the Room of Requirement that has the power to transform his very essence, his soul.