Orochimaru is another. He could be made even more sinister and manipulative. Instead of just being a power - hungry villain, he might be the mastermind behind a much larger and more complex evil plot that affects not just Naruto but the entire ninja world. His experiments could be even more grotesque and unethical in this type of fanfiction.
Sasuke is often a popular character to be portrayed differently. In 'Naruto Evil Within' fanfiction, he might be even more of an anti - hero or fully embrace the dark side, perhaps being more ruthless in his pursuit of power. He could be shown as having a different relationship with Naruto, more adversarial and less likely to be redeemed.
Kakashi could also be given a different portrayal. He might be a character who is losing his grip on his own morality. Maybe he is forced to make compromises due to the evil forces at play. He could be shown as being more conflicted and less of the wise and stable mentor figure that he is in the original series.
Hermione would be one. Instead of being Harry's loyal friend, she might be one of the first to oppose Harry's turn to the dark side. Or, in a more complex take, she could be torn between her loyalty to Harry and her belief in the right way of magic.
Naruto himself is often a popular character in such fanfiction. Since he already has the Nine - Tails within him in the original series, fanfic writers can expand on that concept in unique ways. Sasuke is also popular as he could potentially have a powerful and mysterious animal within added to his already complex character.
In the fanfiction, Evil Naruto might be more cynical and power - hungry. He could have lost his belief in the values of the Hidden Leaf. Gaara, on the other hand, might be more cold - hearted and less likely to show any mercy, as opposed to his more complex and evolving personality in the original series.
Itachi is also a popular choice. Even though he was initially portrayed as a complex character with his own moral code in the original series, fanfiction writers might explore a scenario where he fully embraces the 'evil' side of the Sharingan. This could involve him using it for more malevolent purposes than what was shown in the anime or manga, perhaps using it to manipulate events on a grander scale for his own ends.
Nagato, in fanfiction, can be depicted in various ways. Some may show him as a more conflicted character. He has his own beliefs which were shaped by his experiences, like the death of his friends and the destruction he witnessed. He may be more hesitant to change compared to Naruto, but also has the potential for redemption which makes his character interesting.
In some fanfictions, the Naruto - Sakura relationship is portrayed as a slow - burn romance. Naruto's continuous efforts to protect Sakura gradually make her fall for him. In contrast, in the original series, Sakura was mainly focused on Sasuke. Fanfiction gives an opportunity to change that narrative.
Often, fanfiction will show a more emotional and in - depth bond. Minato might be a constant presence in Naruto's mind, guiding him through tough decisions. This is different from the original where Naruto only gradually learned about his father. Here, their bond is more like an ever - present support system for Naruto.
In terms of relationships, fem Naruto could have a more complex relationship with Sasuke. Maybe she doesn't have the same kind of one - sided crush as Naruto did in the original. Instead, they could start as rivals but slowly develop a mutual respect and understanding that is based on their shared experiences and growth as ninjas.
Ruvik is usually portrayed as a very complex character in 'The Evil Within' Ruvik x reader fanfiction. He's often shown as having a dark and brooding nature. His past traumas are frequently explored, which gives depth to his otherwise menacing presence. He can be both terrifying and alluring at the same time, as his power and mystery draw the reader in.
Obviously, Ruby, Weiss, Blake, and Yang would be main characters. They are the core of RWBY. Ruby with her speed and scythe skills would be crucial in any fight. Weiss, with her ice powers, could freeze some of the terrifying enemies from 'The Evil Within'.