Tim Drake is another popular character. His intelligence and detective skills are on par with Bruce's, and his story of becoming Robin and his relationship with Bruce and the other siblings offer a lot of potential for fanfic writers. His insecurities and determination make him a relatable and interesting character in the 'Bruce Wayne and his kids' fanfic universe.
Obviously, Bruce Wayne's son is a central character. Alfred Pennyworth often makes an appearance as he is an important figure in the Wayne family. Dick Grayson might also be popular as he can act as a mentor or a brother - like figure to Bruce Wayne's son. And of course, the villains from the Batman universe like the Joker or Ra's al Ghul can also be included to create conflict.
Damian Wayne is often a main character. He's Bruce Wayne's son with Talia al Ghul and has been trained in combat from a young age.
One interesting plotline could be the kids getting involved in a mystery that Bruce Wayne is trying to solve. They use their own unique skills, like Damian's combat skills or Tim's detective skills, to help their father.
There might be a fanfic where Bruce Wayne has to deal with the normal parenting issues while also being Batman. His kids could be struggling with school and he has to find a balance between being a father and protecting the city. For example, his son might get into a fight at school and Bruce has to teach him about using his strength in the right way, all while preparing for a night of crime - fighting.
Another reason is the contrast between them. Bruce is a regular human with extraordinary skills and resources, while Clark is an alien with super - powers. Fanfic writers can explore how these differences play out in various situations, whether it's in a fight, a friendship, or a moral dilemma. For example, a fanfic might show how Bruce's cynicism and Clark's optimism clash and then eventually find common ground.
One great fanfic is 'The Father - Son Bond'. It beautifully explores the complex relationship between Bruce and Damian. It shows how Bruce tries to be a good father while also dealing with his role as Batman, and Damian's struggle to fit into this new world with his own strong - willed nature.
He might develop a greater sense of humility. Without the Batman persona to fall back on, he has to face his own limitations as a person. For example, he may struggle to get people to listen to his ideas for change when he doesn't have the intimidation factor of Batman.
Another aspect could be that in some darker fanfics, if Bruce Wayne were to cross a moral line, perhaps Alfred would have to take more extreme measures. He might cut off Bruce's financial resources related to his vigilante activities. This would force Bruce to re - evaluate his actions and the way he operates as Batman. It's a way of punishing him to make him understand the importance of ethics even in his fight against crime.
The plot is also important. It could involve them facing a new villain or a threat to Gotham that tests their relationship. Maybe a situation where Damian's actions put him at odds with Bruce's code of ethics, and they have to work through it. This kind of plot tension can make the fanfic really engaging.
Well, in many Bruce Wayne daughter fanfics, an original character that is quite popular is her mentor. This could be someone outside of the Bat - family who teaches her different skills or a different way of thinking. It gives the daughter a chance to grow independently. And then there's the love interest. An original character designed to be her romantic partner, who may have their own secrets and powers, adding more drama to the story.