Naruko is surely a main character. Additionally, there might be a mentor figure who helps her understand and control the curse mark. And perhaps there are antagonists, like those who want to take advantage of her situation or those who simply oppose her because of the mark.
Well, without actually reading it, it could be about Naruko's journey after getting the curse mark. Maybe she has to struggle with the power it gives and the negative effects it has on her. She might face challenges from those who fear or want to use her new power.
Sakura is the central figure here. However, depending on the direction of the fanfiction, there could be new characters introduced. Maybe an old sage or a mysterious healer who claims to know about the curse mark. But the mainstay characters from the Naruto universe such as Kakashi Sensei could also be involved, guiding Sakura through this difficult time and helping her understand what the curse mark means and how to handle it.
It could be Orochimaru. He is known for his experiments with curse marks, and he might see Hinata as an interesting subject to study or use for his own evil plans.
There could be Naruto. Since he's Sakura's friend, he would likely be involved, trying to help her deal with the curse mark. He might use his own powers and experiences to support her.
I'm not sure specifically as there could be many different takes on it. But generally, it might involve Sakura getting a curse mark which could lead to her facing new challenges, perhaps having to deal with dark powers within her, and it could change her relationships with other characters as they might view her differently or she might have to struggle to control this new aspect of herself.
Well, it could be about Hinata struggling with the new power and the negative effects of the curse mark. Maybe she has to learn to control it to avoid being consumed by its dark side.
Naruto is the central figure for sure. But in many fanfictions, characters like Jiraiya could be involved. Jiraiya, being Naruto's mentor in some ways, would want to study the curse mark and find a way to either remove it or help Naruto use it safely. Another character could be Orochimaru. Since he is associated with the curse mark in the original series, he might make an appearance, either as an antagonist trying to manipulate Naruto through the curse mark or as a source of information about it.
Naruko in this fanfiction is most likely a character that the author has developed for the story. It might be inspired by other characters in the genre or it could be a completely new concept. Maybe she has certain unique abilities or traits that make her the target of being double teamed. For example, if it's in a fantasy setting, she could possess a powerful magic that others want to suppress by ganging up on her.
Sasuke is often a popular choice. His original curse mark in the Naruto series gives a lot of room for exploration in fanfiction. Writers can delve deeper into how it affects his personality and his path towards power. Another popular character is Naruto himself. Imagine if Naruto were to somehow get a curse mark and how he would deal with it, different from Sasuke's way.
She might gain new and unpredictable powers. The curse mark could potentially enhance her strength in combat, like giving her more chakra or new jutsu abilities. However, it could also come with a price, such as being influenced by dark forces.