For Clara, you could develop her character by showing her learning combat skills. Maybe she starts as a damsel in distress but then becomes a strong fighter, trained by the Black Blood Brothers. This would show her growth and determination.
The Black Blood Brothers can be developed further by exploring their backstories more deeply. For instance, revealing the events that made them become the way they are. If one of the brothers has a fear of losing his humanity, you could show how he struggles with that throughout the fanfiction. And for Clara, you could also develop her character by exploring her family background and how it affects her actions and decisions in the story.
To develop the characters further, focus on their relationships. The Black Blood Brothers could have different reactions to Clara's presence. One might be protective, another might be suspicious at first. As for Clara, she could start to influence the brothers in positive ways. For example, she could teach them about the value of human emotions that they may have forgotten. This would not only develop the individual characters but also their relationships with each other.
Another plot could involve a love triangle between Clara and two of the Black Blood Brothers. This would add a lot of drama and tension to the story. For example, Clara might be initially attracted to the more serious brother, but then find herself drawn to the more carefree one as well. As the story progresses, she has to figure out her true feelings while also dealing with the brothers' own issues and the external threats they face.
The two main characters are the black blood brothers themselves.
Well, if it's a crossover with a superhero story, characters like Spider - Man could be great. His acrobatic skills and sense of justice could contrast with the more morally grey areas of the Black Blood Brothers. He could initially be suspicious of them but then come to understand their situation.
To write Zelman well, focus on his strong and protective side. He is often the one looking out for others, especially Mimiko. Highlight his loyalty and his skills as a vampire. For Mimiko, emphasize her innocence and her curiosity. She is new to the vampire world, so her reactions to different situations can be very interesting.
One possible fanfiction could be about Mimiko and Jiro going on a secret adventure together. Maybe they discover a hidden part of their world that no one else knows about. They could face challenges there and their relationship could grow stronger as they rely on each other to get through it.
A great aspect of this fanfiction is the world - building. The Black Blood Brothers universe has a lot of potential for expansion. Writers can create new factions or powers that Jiro and Mimiko have to deal with. This not only makes the story more engaging but also gives a fresh perspective on the original world.
For Aiden, his past as a vigilante could be delved into more deeply. Maybe he has unresolved trauma from his family's death that affects his decisions in new situations with Clara. He could learn to trust her more and open up about his feelings, which would show his growth as a character.
The two main characters are the brothers. Their unique relationship drives a lot of the story. One of them is likely to be more of the leader type, while the other may have different skills or abilities that complement his brother.
To develop Hermione's character in this fanfiction, we can explore her moral compass in greater depth. When interacting with the Lestrange brothers, she has to constantly make decisions about whether to trust them or not. This could lead to internal struggles that show different sides of her. As for the brothers, they could be developed by showing their vulnerability. Perhaps they have nightmares about their past misdeeds and Hermione helps them face these demons. This would make them more complex characters rather than just being the 'bad guys' from the original story.
Some fanfictions might center around a particular event in the series and expand on it. For instance, the battle against the Kowloon Children. The author could add more details about the strategies, the emotions of the characters during the fight, and the consequences that followed in a more elaborate way.