A possible reason for Naruto to be cold - hearted in fanfic is a change in his goals. If in the fanfic he no longer values friendship and the well - being of the village, but instead is focused solely on power or revenge. This shift in his values could make him seem cold - hearted. Additionally, if the fanfic creates a new set of enemies that constantly attack and harm him without any chance of redemption, he might become jaded and cold towards others.
In fanfic, a tragic backstory that was different from his original one could lead to Naruto being cold - hearted. Maybe if he had been abandoned by the whole village instead of just being shunned by some, he could grow up bitter and cold. Also, if he had to make really tough decisions that cost him a lot, like sacrificing friends for the greater good in the fanfic world, it might harden his heart.
One possibility is if he faced extreme betrayal in fanfiction. For example, if his friends turned on him for some reason, it could lead him to become cold - hearted as a form of self - protection. Another factor could be if he lost someone very dear to him in a particularly cruel way and then closed off his emotions.
In some fanfics, Naruto might be depicted as cold - hearted, but it goes against his canonical character. The original Naruto is known for his warm - heartedness, determination, and his ability to see the good in people. Fanfic authors may take creative liberties for various reasons like exploring different storylines or character arcs, but it's not a common or true - to - the - source representation of Naruto.
It could be related to some sort of external influence, like a curse or a dark chakra that has infected him. This could be slowly changing his personality from the warm - hearted Naruto we know to a cold - hearted version. For example, if there was a powerful enemy who placed a curse on him that targeted his emotions.
A love interest who breaks his heart multiple times. For example, if this person plays with his feelings, lies to him, or cheats on him, Percy could become cold - hearted as a form of self - protection. He would no longer trust easily and would close his heart to new relationships.
One reason could be that the writer wants to create conflict. By making Percy cold - hearted, they can set up situations where he has to overcome this new trait. Maybe it's a way to show how much he's changed due to some extreme event in the fanfiction's plot.
Maybe Percy has been through a great betrayal, like his closest friend turned on him for power. So he starts to close off his emotions to avoid being hurt again.
It could be that the writer is trying to subvert the traditional view of Harry Potter. They might think that exploring a darker side of him, making him cold - hearted, could lead to an interesting and unexpected plot. For example, if Harry had been betrayed in a different way than in the original story, it could potentially turn him cold towards others. Another reason could be that the author simply has a different perspective on the character and wants to express it through fanfiction.
One good 'Naruto cold hearted fanfic' could be 'The Icy Shinobi'. In this fic, Naruto is portrayed as cold-hearted due to a series of betrayals. He becomes a lone wolf, relying only on his own strength and not trusting others easily. Another one might be 'Frosted Bonds' where his cold - heartedness is a result of a dark past that has made him shut out emotions related to friendship and love.
One possible plot could be that after losing many friends in a major battle, Naruto becomes disillusioned. He might start to see the world as a cruel place where strength is the only thing that matters. So he shuts off his emotions to avoid further pain, and becomes cold - hearted towards his former allies and enemies alike.
In a 'Naruto cold hearted fanfic', Naruto often loses his usual optimistic and friendly nature. For example, he may no longer believe in the power of friendship like he did in the original. Instead, he could be more self - centered, focusing only on his own goals and not caring about others' feelings or well - being.