In developing Dark Naruto, he could be made to have a more nuanced view of the world. He doesn't just see things in black and white like the original Naruto. He understands that there are shades of gray in the ninja world. So, he might make decisions that are not so straightforward. As for Fem Sasuke, her character could be developed to be more of a team player. In the original, Sasuke was often a lone wolf. Fem Sasuke could be more open to working with others, especially with Dark Naruto. She could also have a different relationship with her Sharingan. Instead of just using it for combat, she could use it to understand the emotions and motives of others, which is a new aspect not seen in the original Sasuke's use of the Sharingan.
Dark Naruto could be developed to have a different set of ninja skills. He might learn some forbidden jutsu on his own in his journey to the dark side, which gives him an edge over others. In terms of Fem Sasuke, she could be more in tune with her feminine side. Instead of just being cold and brooding like the original Sasuke, she could use her charm and intelligence to get what she wants. For instance, when dealing with enemies, she might use her wits to outsmart them rather than always relying on brute force. Also, Dark Naruto could have a more philosophical side, constantly questioning the nature of power and the ninja world, which is different from the more impulsive original Naruto.
In the original series, Naruto is mainly focused on becoming Hokage and getting Sasuke back. In the fanfiction, as Anbu Naruto, he might be more secretive and have a darker side. He could be more cynical about the village's politics. Female Sasuke, on the other hand, may be more independent than in the original. She could be more involved in political matters in the village rather than just seeking revenge. For example, she might use her skills to try and reform the ninja system.
Sasuke in fanfiction could be developed with more vulnerability. In the original series, he is often seen as stoic and brooding. But in fanfiction set in the ANBU world, he might show his fears and doubts more as he has to deal with the high - stakes and secrecy of ANBU missions. Sakura could be more assertive. In the original, she sometimes seems to be in Sasuke's shadow. Here, she could be an equal or even a leader in ANBU operations. The ANBU environment forces both of them to grow in new ways.
Dark Naruto could be developed by giving him new abilities that are a result of his darkness. This would change his fighting style and how he approaches problems. Karin could be developed by making her more of a strategist. Instead of just being a sensor, she could use her knowledge of the ninja world and her understanding of Naruto to come up with plans. For example, she could figure out ways to help Naruto control his dark side better through certain training regimens.
Naruto could be given a more complex personality in the modern fanfiction. He might be more introverted at first, having to deal with the loss of his father in a modern way (like through memories in a digital photo album). Kushina, on the other hand, could be shown as having a secret past that is slowly revealed through modern - day detective work by Naruto and his friends, which would be a big departure from her straightforward backstory in the original.
One way their characters are developed differently in fanfiction is through their parenting styles. In the original series, since they die early, we don't really see them as parents. But in fanfiction, we can see different approaches. Minato could be the strict yet loving father, teaching Naruto advanced ninjutsu from a young age. Kushina could be the nurturing mother, always making sure Naruto is emotionally okay. Additionally, their characters can be developed in relation to the political situation of the village. They could be involved in secret political maneuvers to protect the village and Naruto's future as a potential great ninja.
For Hinata, her normally shy and reserved nature could be twisted into a more calculating and cold - hearted one in the dark fanfiction. She might use her byakugan not for protection but for manipulation. Naruto, on the other hand, instead of his usual optimistic self, could become more cynical after facing multiple betrayals, especially if Hinata is involved in some of them.
The way Fem Luke interacts with the Force could also be different. Maybe she has a more intuitive connection to the Force, especially when it comes to aspects like sensing the emotions of others. This could make her a more empathetic Jedi, and it could also change how she uses the Force in combat or in diplomatic situations. For example, she might be able to defuse tense situations by sensing the underlying emotions of the parties involved and using the Force to soothe them.
Well, in some fanfictions, instead of the typical rivalry starting early, Naruto could be like an older brother figure to toddler Sasuke right from the start. He could teach Sasuke simple things like how to climb a tree or catch a fish, which would build a strong bond of trust and friendship between them.
She could be more in tune with her femininity, using it as a strength rather than a hindrance. For example, she might be more perceptive about emotions, both her own and others', which could help her in diplomatic situations with the gods. Instead of the more straightforward and sometimes brash approach of the original Percy, Fem Percy could be more subtle and strategic.
Well, in a fanfiction, Sasuke could be more open and friendly towards Naruto from the start. Instead of their rivalry, they could become like brothers immediately. Sakura could be more independent and not just focus on Sasuke romantically. She could form a strong bond with Kakashi as a mentor - like figure. This would change the whole dynamic of their relationships. For example, they could all train together as a group more often.