Naruto and Shinso are the primary ones. But we could also have an old and wise vampire elder as a main character. This elder could have knowledge about a prophecy that involves Naruto and Shinso, and his actions and decisions would drive a lot of the plot as he tries to either fulfill or prevent the prophecy.
In most shinso vampire Highschool DxD fanfiction, aside from the shinso vampire itself, characters like Akeno Himejima could be main characters. She has her own powers and personality that would interact interestingly with a shinso vampire. Also, Koneko Toujou could be important. Her relationship with the shinso vampire might involve her cat - like nature and her role in the devil society. And of course, there could be original characters created specifically for the fanfiction that become main characters as well.
Well, the plot could start with Naruto being turned into a Shinso Vampire in some mysterious way. Maybe during a mission in a strange land, he gets bitten by a powerful Shinso Vampire. Then, he has to deal with his new powers and cravings while still trying to protect the Hidden Leaf. His friends might initially be scared of him, but as they learn more about his situation, they try to help him control his vampire side.
Tsukune himself is quite interesting. He's a human in a world full of vampires, which makes him an outlier. His journey of adapting to this new world and developing his powers is always engaging. Moka is also a great character. Her dual personality, with the sweet outer self and the more powerful vampire self, adds a lot of depth. Inner Moka especially is a force to be reckoned with. And then there's Kurumu, the succubus. Her pursuit of Tsukune in the fanfiction can lead to some really fun and flirty storylines.
Well, of course, there's the little vampire himself. He could have a best friend who is a human, a brave kid who is not afraid of the vampire's nature. There might also be an old vampire mentor who teaches the little one about vampire traditions and how to control his thirst.
A new, original character could be the main character in a Naruto chains fanfiction. This character could be from a small, unknown ninja village and possess a unique ability to control chains made of some special material. They could come to the Hidden Leaf Village and get involved in the events there, interacting with the well - known Naruto characters.
In 'naruto shinso vampire dxd fanfiction', the theme of adaptation is quite prominent. Characters are thrust into a completely new environment with different rules and species. They need to adapt to survive. Another theme is the struggle for power and control. With the addition of Shinso powers and vampirism, there are often power struggles within the story, whether it's between different factions in the DxD world or between Naruto characters and the new elements they've acquired.
Well, for a fanfiction like this, Naruto could bring his ninja training and knowledge of different jutsus. Shinso's presence would add a psychological aspect as he can mess with people's minds. They could get involved in the power struggles in the Vampire Highschool DxD world. Maybe they side with a particular group, like the Gremory family, and help them in their battles against other factions. It would be a story full of action, mystery, and new friendships as Naruto and Shinso navigate this strange new world.
Obviously, there would be the queen vampire, his mother. She could be a powerful and mysterious figure, perhaps with her own motives and plans for Naruto. There might also be some vampire elders or nobles who play a role in Naruto's life, either guiding him or trying to use him for their own purposes.
A young vampire who is new to the vampire queen's court. This vampire is naive and still learning about the ways of the vampire world. He could provide a different perspective and also be a source of trouble as he makes mistakes and the vampire queen has to deal with the consequences.
Kurumu would be a great character to include. She has a crush on Tsukune and her jealousy towards Moka could add some interesting drama to the side story. Also, Mizore, with her cold exterior but warm heart towards Tsukune, could bring in some unique interactions. Gin, being a werewolf, could also be included as he has an uneasy relationship with the vampires, which could create tension and conflict in the side story.