Naruko might also gain some vampire - like powers. For example, she could have increased speed and strength. However, she would also have to face the negative aspects. Vampires are often hunted or feared in many fanfictions. So she would have to constantly be on the lookout for those who would do her harm, and she would have to learn how to control her new vampire nature so as not to attract unwanted attention.
At first, Naruko would probably be in denial. But as time passes, she might start to learn about her new abilities. She could practice using her enhanced speed and strength in private. And she would have to figure out how to get blood without harming others, maybe by finding willing donors or some substitute.
The consequences could be far - reaching. Naruto's relationships would surely be strained. His relationship with Sakura, for instance, might become complicated as she may be afraid of him or try to find a way to cure him. His bond with Sasuke could also be tested. Sasuke, being more attuned to darker powers, might have a different reaction compared to others. Moreover, Naruto would have to deal with the vampire community if there is one in the fanfiction world. He would need to learn their rules and how to control his new urges, or else he could become a danger to those he loves.
The bite might also change her appearance. She could develop paler skin, more prominent fangs, and a more alluring yet slightly menacing look. Her magic could be affected too. It might become intertwined with her new vampire nature, resulting in some unique and unpredictable magical effects that she would have to learn to control.
In a Naruko x Rosario Vampire crossover fanfiction, the plot could center around a tournament. The idea could be that both the ninja world and the Rosario Vampire world participate in a grand tournament to prove which world has the stronger fighters. Naruko would be one of the representatives from her world. She would face off against the various characters from Rosario Vampire. This would lead to some interesting battles and also some unexpected friendships as they learn about each other's cultures and fighting styles.
One possible plot is that Naruko discovers her vampire bloodline after an encounter with a powerful and ancient vampire. This newfound heritage causes chaos in her life as she is both feared and desired by different factions. Some might want to use her power for evil, while others see her as a key to a greater good. She has to navigate this complex web of relationships while coming to terms with what she is.
There's also the possibility of pairing Naruko with Sirzechs. His powerful and noble nature could contrast well with Naruko's more brash and energetic personality. It could lead to a story where they have to work together to solve a major problem in the DxD world, and in the process, develop a deep connection.
Love is a very common theme. It could be the forbidden love between a vampire and another female character. Another theme is power, as vampires often have special powers in these stories, and how that affects the relationship.
Love and relationships are often a big theme. Since it's yuri, it'll likely involve romantic relationships between female characters. The vampire aspect might bring in themes like immortality, bloodlust, and the struggle between human and vampire nature.
It might be. Popularity in the fanfiction realm is a tricky thing. Vampire - themed fanfictions often do well because of the allure of the vampire archetype. In the case of 'naruko is a vampire fanfiction', if it manages to blend the characteristics of naruko with the typical vampire traits in an engaging way, and if it gets enough exposure within the relevant fan communities, it has the potential to be popular.
Her friends are likely to be part of it. A close female friend could be like a pregnancy buddy, sharing her own experiences if she has any. There might also be a mentor - like figure, an older woman who has been through pregnancy and can give Naruko valuable advice on everything from childbirth to raising a child.