One possible reason could be a misunderstanding. Maybe there were some miscommunications in the family that made Harry feel alienated, so he became cold. For example, if his family misunderstood his intentions in certain matters, like his career choice or relationships, it could lead to this situation.
Open communication is key. Harry and his family need to sit down and talk honestly about their feelings and issues. Just by expressing what's on their minds, they can start to understand each other better.
Another reason might be that Naruto has been influenced by external forces. Maybe he has made some bad friends or been involved in some situations that made him think being cold to his family was the right thing. He could have been brainwashed into believing that his family was holding him back from achieving something greater.
One possible reason could be the way the Dursleys treated him. They were cruel, made him live in a cupboard, and constantly belittled him. This kind of mistreatment over the years could easily lead to hatred. Another aspect could be the lack of connection to his wizarding family that he was not aware of for a long time. He might feel angry at his parents for leaving him in such a situation without any real protection from the Dursleys.
Perhaps he is trying to hide his true self. He may have a side of him that he doesn't want others to discover, like some special abilities or a different origin. So, being cold to everyone helps him keep his secrets and avoid getting too close to people who might figure him out.
He might learn about hidden magical talents in his family. For example, perhaps there were ancestors who could communicate with magical creatures in a unique way that was lost over time.
One possible reason could be a feeling of betrayal. Maybe he found out some long - hidden family secrets that made him lose trust in his family. For example, if he discovered that his parents had made a deal with some dark force in the past that had negative consequences for him or the village.
One possible reason could be that he has faced a lot of misunderstandings within the family. Maybe his family has certain expectations that he can't meet, and over time, this has led to his coldness. For example, if his family doesn't understand his dreams or ambitions, Naruto might feel alienated.
His relationships would change a great deal. The friends who once knew Harry as a somewhat vulnerable and kind - hearted person would now have to deal with this new, cold - edged strength. Those friends who were closer to him for his softer side might drift away. However, some might see this as a positive change in a way, like they might think he's finally growing up and becoming more self - reliant. But still, there would be a lot of adjusting to do on both sides.
Another common character could be Hagrid. He was such an important part of Harry's life at Hogwarts and might continue to be in the fanfiction, perhaps coming over to the Potter family's house to show the kids some new magical creatures or give them some advice on their magical studies. There could also be characters from the Ministry of Magic, like some new Aurors who interact with the Potter family in different ways, either as friends or as those who are a bit suspicious of their activities.