One idea could be a crossover with a popular fantasy series like 'The Lord of the Rings'. Imagine the characters from Trinity Blood in the Middle - earth setting, with vampires and other supernatural beings interacting with hobbits, elves, and humans. Another idea is a crossover with a superhero universe. The vampires in Trinity Blood having to face off against superheroes or even teaming up to fight a greater evil. For example, they could join forces with the Avengers.
Abel Nightroad would be a great character to feature. His complex personality, being a vampire but also having a strong sense of justice, would make for interesting interactions in a crossover. Also, Esther Blanchett. She is a strong - willed human who could hold her own in different crossover scenarios. For example, in a crossover with a magical world, she could learn new spells and use her intelligence to navigate the new situation.
The chakra system in Naruto and the powers in Trinity Blood are quite different. Chakra is an energy that can be molded for various techniques. In a crossover, the vampires in Trinity Blood might view chakra as a new form of energy source. They could try to either consume it or find a way to integrate it into their own powers. For example, a vampire might try to use chakra to enhance their physical abilities further.
One idea could be that Naruto characters are transported to the Trinity Blood universe. Naruto, with his strong will and powerful chakra, might be seen as a threat or a potential ally in the complex political and religious landscape of Trinity Blood. For example, his shadow clone jutsu could be mistaken for some form of dark magic in that world.
One common theme is identity. OCs often struggle to find their place in the complex world of Trinity Blood, whether they're half - vampire, half - human or something else entirely. Another theme is power. They might be discovering new powers or trying to control existing ones.
There are fanfictions that focus on alternate endings. Maybe in one, Abel Nightroad doesn't sacrifice himself and instead finds a way to bring peace without such a great cost. This type of fanfiction allows fans to explore different possibilities within the Trinity Blood universe.
You can start by looking on fanfiction websites such as Archive of Our Own (AO3). It has a large collection of Trinity Blood fanfictions, with different genres and themes. The search function on AO3 allows you to filter by various criteria like rating, length, and tags.
The theme of survival in a post - apocalyptic world is also prominent. With the world in chaos due to the conflict between different species, characters have to constantly fight for their own survival and the survival of their kind. This forces them to make difficult choices and face various challenges.
One great Trinity Blood OC fanfiction is 'The Lost Heir'. It features an original character who discovers they have a hidden connection to the main plot's events. The character development in this fic is really well - done.
One of the main themes is the struggle between different species, like vampires and humans. There is also a theme of redemption, as some characters try to atone for their past actions.