The scars on his back in fanfiction can be a major factor in his character development. Firstly, they could be a source of shame for him, especially if they are related to something he believes was his fault. This could lead to him isolating himself from his friends at times. However, as he grows, he could learn to accept the scars as a part of his story. They might also give him a unique identity among the wizarding community. People might see him as a survivor of some great ordeal, which could either make them look up to him or be jealous of the attention he gets. This in turn would shape how he interacts with others and how he views himself in the long run.
They could be a constant reminder of his past struggles. This would make him more determined to prevent others from going through similar hardships. So, his character becomes more empathetic and protective. Also, the scars could give him a sense of mystery, which might attract some characters to him while repelling others who are afraid of his past.
The scars could make him more self - conscious. He might be hesitant to show his back, which could affect his relationships. For example, he may avoid close physical contact with others.
It makes him more brooding. Harry might become more withdrawn as he contemplates the 'death' within his scars. He could be constantly reminded of the fragility of life and the nearness of death, which would make him more cautious and less impulsive in his actions.
The scars might make Ezra more cautious. After getting them, he realizes the real dangers in the galaxy and becomes more careful in his actions, especially when facing the Empire.
In the fanfiction, Percy's scars could potentially make some people fear him. They might be a sign of the dangerous battles he has been in, and some characters might be wary of getting too close in case they get caught up in similar danger.
On the other hand, his scars could strengthen his relationship with his mentors. Kakashi, for instance, might see the scars as a mark of Naruto's growth and maturity. He could take Naruto on more challenging missions, trusting that he has learned from whatever experience gave him those scars.
If Harry is taller in fanfiction, it could make him seem more confident. People often associate height with leadership, so he might take on more of a leadership role among his peers.
Well, it likely makes him more independent. He has to rely on himself more without parental support. He might grow up quicker, learning to fend for himself and make his own decisions earlier than he would have with loving parents.
It can make him more confident. Since he has knowledge from the future, he can be more assertive in his actions. For example, he won't be as hesitant in confronting his enemies.
It can make him more independent. Without his parents' protection, Harry has to learn to fend for himself, which can lead to him becoming more self - reliant. He'll have to figure out how to solve problems on his own.
It could potentially make Harry more empathetic towards others who are in fearful situations. Since he has experienced such intense fear himself, he may be more likely to understand and help those who are also afraid. In the fanfiction, this could be shown through his interactions with other characters who are facing their own fears.
It could make him more cautious. After talking to the Horcrux, he realizes how devious Voldemort's magic can be and becomes more careful in his future encounters with dark magic.