Well, aside from Naruto, Rock Lee can be quite popular in Blood Prison fanfiction. His determination and unique fighting abilities can add an interesting dynamic to the prison environment. Also, Orochimaru might be a character that shows up a lot. His thirst for knowledge and dark experiments could be linked to the secrets that the Blood Prison might hold, making him a character full of potential in these fan - made stories.
Naruto is a given as the main character, but Sasuke can also be a popular choice in Naruto Blood Prison fanfiction. Writers might explore the idea of Sasuke ending up in the Blood Prison and how he would interact with Naruto there. Then there's Killer Bee, who could bring his unique fighting style and personality to the prison setting, making him an interesting addition to fan - created stories.
Obviously, Haren is one of the main characters. There might also be the prison guards who play significant roles in creating conflict or helping Haren. Another could be a mysterious inmate who has some knowledge about Haren's past or the secrets of the Blood Prison.
The main character is Naruto, as it's a Naruto - centered fanfiction. But in the Blood Prison setting, there could be other key characters. For example, the warden of the prison who might be a cruel or mysterious figure. Also, there could be a fellow inmate who has a special connection with Naruto, either as a friend or a rival. These characters play important roles in driving the story forward in the context of the dark and dangerous Blood Prison.
Some fanfictions might also feature the prison guards as main characters. They could be complex characters with their own motives and backstories, and their interactions with Naruto could drive the plot forward. For example, a guard who initially sees Naruto as just another prisoner but then comes to respect him.
Naruto is a very likely character. Given his rebellious nature and his history of being an outcast in some ways, it's easy to imagine a scenario where he gets caught up in something that lands him in prison. His determination to break free and his loyalty to his friends would make for an interesting story.
Naruto himself is often a popular character in these fanfictions. Writers like to explore how his existing powers could interact with blood mage abilities. Sasuke is also a common choice. His Sharingan and his quest for power could be combined with blood magic in interesting ways.
Kakashi is another character that could be popular in 'naruto blood manipulation fanfiction'. His Sharingan and his intelligence could be combined with blood manipulation. For example, he could use his knowledge of the Sharingan to better understand the flow of blood in the body and develop new jutsus. Sakura, with her medical ninjutsu knowledge, could also be a major character. She might start exploring blood manipulation to enhance her healing abilities, perhaps finding a way to use it to revive the critically injured. And there's always the possibility of new original characters being created specifically for these fanfictions, with their own unique blood manipulation abilities.
Naruto himself could be a likely main character. Given his determination and his ability to make friends, it would be interesting to see him in a harem situation within the Blood Prison. He could use his ninja skills to protect the harem members and try to break free from the prison's mysteries.
Kojou Akatsuki is definitely a popular choice. As the main character, he has a lot of potential for different storylines. His complex nature as a vampire yet still a high school student makes for interesting character development.
Arya Stark is another character that could be very popular in 'ice fire and blood fanfiction'. Her skills as an assassin and her strong will make her a great subject for new stories. Fans might write about her taking on new enemies or exploring new lands. Tyrion Lannister too, with his sharp wit and complex family relationships, is a character that fanfiction writers might focus on. They could explore his role in different political situations or his relationships with other characters in more detail.
Alucard is often very popular. His mysterious and powerful nature makes him a fascinating character to write about. Writers can explore his past, his powers, and his complex relationship with Hellsing.