In such a fanfiction, Harry might become a very different person. He could be more in tune with the Dark Arts. Maybe he would have a skewed sense of morality, influenced by Voldemort's views. He might also be more powerful in the Dark Arts but struggle with his identity as he is constantly in conflict between what he's been taught by Voldemort and his own inner goodness.
One interesting concept could be the moral and ethical dilemmas Harry would face. Growing up with Voldemort as his guardian, he might be torn between the dark teachings and his own inner sense of good. Another could be his relationships with the other Death Eaters. He might form strange alliances or rivalries within that dark circle.
Harry in this fanfiction is likely to be more ruthless. Voldemort's upbringing would make him less empathetic. He may value power above all else and be more willing to use dark magic to achieve his goals. His relationships would also be different. He wouldn't have the same close - knit group of friends as in the original story. Instead, he might be surrounded by Death Eaters or those who follow Voldemort's ideology.
His personality would probably be more cold and calculating. Voldemort's influence would make him less empathetic. He might be more ruthless in achieving his goals.
If that were the case, Harry might struggle with his identity and morality. Voldemort's teachings could corrupt him, but there could also be an internal battle within Harry to resist that influence.
If Hermione was raised by Voldemort in fanfiction, she might have a completely different personality. She could be more ruthless and power - hungry. Her magic might be used for more dark purposes. For example, she could be trained to be one of Voldemort's most powerful lieutenants, using her intelligence to plan his attacks and strategies.
Harry often becomes more conflicted. He has always seen Voldemort as the ultimate evil, but now being mates, he has to re - evaluate his views. He might start to see the humanity in Voldemort, which makes him question his own beliefs and actions in the fight against the Dark Lord. For example, he may hesitate in battles more than before.
Often in fanfiction, their relationship can change drastically. They could end up as allies, which would require both of them to change. Harry would have to see past Voldemort's evil deeds, and Voldemort would have to let go of his hatred for Harry. This exploration of character change makes fanfiction so interesting.
There could be. Fanfiction communities are full of creative ideas. Nagato has his own set of abilities and a complex backstory. If he were to raise Harry, it would likely change the trajectory of Harry's life in many ways. Maybe Harry would learn different forms of magic or have a different view on good and evil. However, it's also possible that no one has written this particular fanfiction yet. It all depends on the creativity and interests of the fanfiction writing community.
There is indeed voldemort marries harry fanfiction out there. Fanfiction writers often take creative liberties and imagine all sorts of scenarios that deviate from the traditional storylines. This particular concept might seem strange at first, but it allows for new interpretations and character developments within the fan - created stories.