The exploration of their backstories. Both characters have complex backgrounds. Blackfire's relationship with her sister Starfire and Raven's demon heritage. Fanfiction can delve deeper into how these backstories might affect their relationship with each other. It could be a story about Blackfire understanding Raven's struggle with her inner demons, or Raven seeing a different side of Blackfire that is not just about power and domination.
You can start by looking on fanfiction websites like Archive of Our Own (AO3). It has a large collection of fanfics, and you can simply search for 'Blackfire x Raven' in the search bar. Another option is FanFiction.net, which also has a wide variety of stories in this category.
Beast Boy is another good option. His ability to transform into different animals can bring humor to the fanfiction. He could also be a mediator between Starfire and Blackfire, using his light - hearted nature to ease the tension between the two sisters. His friendship with Starfire can also be explored further in relation to Blackfire.
The uniqueness lies in the potential for character growth. Naruto already has his own arc of growth in his original series. But when he meets Blackfire, new challenges and opportunities for development arise. Blackfire, too, can change and evolve in this new setting. Their relationship can be explored in many ways, whether it's a romantic one or just a strong friendship. And the fanfiction can take this in directions that the original Naruto series and Blackfire's story wouldn't go on their own.
One good 'naruto x blackfire fanfiction' could be 'The Meeting of Fire and Wind'. It explores an interesting dynamic between Naruto and Blackfire where they team up to face a new threat in the ninja world. Their different abilities and personalities create an engaging story.
One common theme is the clash of different cultures. Robin is from Earth and Blackfire is from another planet, so their cultural differences often play a big role. Another theme is the idea of forbidden love, as they are often on opposite sides at first. For example, Blackfire has been an antagonist in some cases.
One common theme is redemption. Often, either Red X or Blackfire (or both) are on a journey to redeem themselves in some way. For example, Red X might be trying to break away from his criminal past and Blackfire could be seeking to make amends for her actions on Earth.
One popular theme is the exploration of their sisterly relationship. It could be about them reconciling after past differences. Another theme might be their different powers and how they interact in various situations. For example, they could team up against a common enemy using their unique abilities.
A different approach could be a time - travel fanfiction. Jinx accidentally travels to Raven's past and disrupts things. Raven has to figure out how to send Jinx back while also dealing with the changes Jinx has caused in her past. This could lead to some really interesting interactions as Raven tries to understand Jinx's chaotic nature in a different time period.
A lesser - known but really interesting one is 'Blackfire and Red X: Unlikely Allies'. This fanfiction starts with their initial animosity but gradually shows how they find common ground. It has some great action scenes and the character development is quite well - done. It's a great exploration of what could happen when these two characters interact in different situations.