Dark Naruto himself is often a very popular character in such fanfiction. His transformation into a darker version of himself brings a whole new level of complexity and power. Dark Kyuubi is also quite popular as it adds an element of danger and mystery. Additionally, characters like Sasuke might also be popular as he could potentially have an interesting dynamic with Dark Naruto, either as an ally or an enemy in the dark - themed story.
Naruto himself is often a central character in these fanfictions. His different versions, especially the 'dark' Naruto, can be really popular as it's a new take on a well - known character.
Sasuke is often a popular character in Naruto dark side fanfiction. His natural brooding nature and his own internal struggle with power and revenge can be easily explored in a darker context. Another one is Itachi. His complex backstory and the secrets he held can be further delved into in a darker version of the Naruto world.
Well, Naruto is no doubt a top choice. He has a huge fan base already, and in Dark Slayer style fanfiction, fans are interested in seeing how he would handle the new and dangerous dark powers. Sasuke is another one. He has always been on the edge between light and dark, so it's natural for him to be a central figure in these stories. Then there's Orochimaru. His obsession with power and his dark experiments make him a very fitting character for Naruto Dark Slayer style fanfiction. He can be either the main villain or a source of the dark powers that others are after.
Sasuke is often a popular character in these fanfictions. His relationship with Naruto can be further explored in the context of the Kyuubi's fatherly influence. Maybe Sasuke is initially skeptical of this new - found bond between Naruto and the Kyuubi but later comes to accept it. Sakura is also a common character. She might notice the changes in Naruto due to the Kyuubi's fatherly presence and be either supportive or a bit jealous. Kakashi could also be there. He might be observing Naruto's growth under the Kyuubi's guidance and offer his own wisdom as Naruto's former teacher.
In Dark Naruto Mokuton fanfiction, one popular type of original character is the healer. Since Naruto's dark side and Mokuton powers could potentially cause harm to himself or others, a healer character is created to keep things in balance. They might have unique healing abilities that work specifically with chakra imbalances caused by the dark side and Mokuton. Also, there are often original antagonists who are specifically after Naruto's Mokuton power because of its rarity and strength when combined with his dark side.
Judy Hopps is often a central character in Zootopia dark fanfiction. Her idealism can be twisted in a darker version. For example, she might start to question her own beliefs when faced with the harsh realities of a corrupted Zootopia. Nick Wilde is also popular as he can be portrayed as either a reluctant hero or a character who has to adapt to the new, darker environment in different ways.
Nick Wilde is often a popular character in dark zootopia fanfiction. His street - smart nature and his past as a con - artist can be explored in darker scenarios. Writers might show him getting dragged back into his old ways due to some external pressure or a personal vendetta.
Roland is often a very popular character in the dark tower fanfiction. Since he is the central figure in the original series, many fanfiction writers like to continue his story or explore different aspects of his personality.
Kalin is often a popular character in Dark Signers fanfiction. His complex backstory and his conflicted nature make him an interesting subject. Writers like to explore his relationship with Yusei and how he became a Dark Signer.
The main hero characters from the game are often popular in fanfiction. They are the ones players identify with most during the game, so it's natural for them to be central in fan - created stories. For example, the characters with unique abilities and strong personalities tend to be fan favorites.