One idea could be that Bella struggles to control her dual nature. Since she's a hybrid, she might have the speed and strength of a vampire and the heightened senses and connection to nature of a werewolf. For example, she could find it difficult to be around her human friends without accidentally revealing her super - human abilities. She may also face challenges within the werewolf and vampire communities as they might not fully accept her hybrid status.
A popular one is 'Hybrid Moon Rising'. In this story, the vampire werewolf hybrid is a key to a prophecy. The author does a great job of building the world around the hybrid, showing different vampire and werewolf clans' reactions to this new being. It's filled with mystery and a lot of cool supernatural elements.
One common theme is identity struggle. The hybrid is often caught between two very different species, not fully belonging to either. For example, in many stories, they have to hide their true nature from both vampires and werewolves.
One possible plotline could be that Naruto is somehow turned into this werewolf - vampire hybrid. He then has to struggle with new powers and instincts. For example, he might have the werewolf's enhanced strength and sense of smell along with the vampire's ability to hypnotize or super speed. And he has to keep this a secret from his friends in Konoha while also fighting against new enemies who are either after his new powers or are also some sort of hybrid or supernatural beings.
I'm not sure of a specific 'naruto werewolf vampire hybrid fanfic' off the top of my head. But you can try searching on fanfic websites like FanFiction.net or Archive of Our Own. They usually have a wide variety of fan - made stories, and you might be able to find what you're looking for by using relevant keywords in their search bars.
A great plot twist could be that Bella's hybrid nature was actually a planned experiment by an ancient and powerful supernatural being. This being could have been manipulating events in the background to create the perfect hybrid. Another twist could be that Bella's transformation into a hybrid causes a ripple effect that changes the rules of the werewolf and vampire worlds. For instance, other hybrids start to be born naturally, which was previously thought impossible.
The hybrid might have the pale, flawless skin of a vampire, but with a more rugged or muscular build like a werewolf. Its eyes could be a unique color, perhaps a mix of the golden or red of vampires and the amber of werewolves. It may also have fangs like a vampire, but longer, more prominent canines like a werewolf. And it could have a wild, unruly mane of hair, which is a characteristic of werewolves, but still maintain a certain elegance like a vampire.
One idea could be that the hybrid has unique powers that neither vampires nor werewolves possess. For example, the ability to control the elements, which could be a result of the combination of vampire and werewolf genetics. Another plot could revolve around the hybrid being an outcast from both vampire and werewolf communities and having to find its own place in the world. It could also be a key to bringing peace between the two feuding groups.
Others may struggle with it. They might constantly battle the inner conflict between the two sides. The vampire side could be more refined and calculating, while the werewolf side is more primal and instinctual. This internal struggle could lead to some characters isolating themselves from society, fearing they might lose control and harm others. They would then have to find ways to reconcile these two parts of themselves, perhaps through magical means or self - discovery.
One interesting storyline could be a hybrid character struggling to find their place in the wizarding world. They might be shunned by both vampires and werewolves, yet possess unique powers that could be useful in the fight against dark magic. For example, their vampire side could give them enhanced speed and strength, while their werewolf side might offer a connection to nature that helps in certain spells or potions. Another could be a love triangle between a vampire - werewolf hybrid, a pure - blood wizard, and a Muggle - born witch, exploring themes of prejudice and acceptance in the magical community.