His once optimistic and determined personality would turn cynical. Instead of seeing the good in people, he would suspect everyone. For example, he would no longer trust his friends easily. His sense of humor would disappear, replaced by a cold and sarcastic attitude. He would become more secretive and withdrawn, not sharing his thoughts and feelings like he used to.
In a 'Naruto becomes dark' fanfic, Naruto's personality undergoes a significant transformation. His kindness and compassion would be replaced by anger and vengeance. He would no longer be the boy who wanted to save everyone. If someone wronged him, he would seek revenge instead of forgiveness. He would become more calculating, using his intelligence not for the good of the village but to further his own dark goals. His loyalty, which was once a strong trait, would be redirected. He might still have a sense of loyalty, but it would be towards those who support his new dark path or those he feels have been wronged like him. He would also lose his naivete and become more worldly - wise in a negative way, knowing all the dark secrets of the world and using them to his advantage.
Naruto's personality in a 'Naruto becomes dark' fanfic changes drastically. He becomes much more aggressive. His usual friendly and approachable demeanor vanishes. He might start to intimidate others instead of befriending them. His positive outlook on life is replaced by a nihilistic view. He believes that there is no real good in the world anymore. His self - confidence turns into over - confidence bordering on arrogance. He thinks he is the only one who can see the truth in the corrupt ninja world and that he has the right to do whatever it takes to change it, even if it means using immoral methods. He also becomes more solitary, distancing himself from those he once cared about as he feels they can't understand his new perspective.
He might become more cynical. Instead of seeing the good in people like he used to, he starts to suspect everyone's motives. For example, he may no longer trust his friends easily.
He might become more patient. As a dad, he has to deal with his kids' tantrums and mistakes, so patience is key.
He might become more brooding. Instead of his usual sunny and determined self, he could be more withdrawn as a dark cleric, constantly thinking about the implications of his new powers and the dark path he's on.
His personality might become more aggressive. The demon nature could bring out his primal instincts, making him less patient and more prone to anger.
In this fanfiction, Naruto could turn ruthless in terms of his relationships too. He might cut off ties with those he used to consider friends if he feels they are holding him back. His once warm and friendly attitude towards others could be replaced with a more calculating and self - centered one. He may start using people to achieve his goals rather than working together as he did before.
Naruto might become more withdrawn like Gaara was initially. Gaara was isolated due to his power and the fear others had of him. So Naruto could start to keep to himself more, losing some of his boisterous and friendly nature.
His positive and determined personality would turn into a cynical and cruel one. He might lose his sense of justice and become self - centered.
His personality would become more reserved. As an assassin, he couldn't be as open and friendly as he used to be. He'd have to keep his emotions in check to avoid being detected.
Naruto's personality would become more brooding. He would be less impulsive and more calculating, like Batman. He might not be as openly friendly as he was before, keeping his thoughts and plans more to himself.
If Naruto becomes involved with Slenderman in a fanfiction, his usually cheerful and determined personality might become darker. He could be more withdrawn as he grapples with the strange and often terrifying aspects of Slenderman's world.