Batman himself is obviously one of the most popular characters. He is the central figure and the source of the 'badass' factor in the fanfic. The Joker is also very popular as he provides a great contrast to Batman with his chaos and madness. Harley Quinn is often included as well, with her complex relationship with the Joker and her own brand of insanity. Another popular character is Robin, who represents the sidekick and the future of Batman's legacy.
In 'batman badass fanfic', Nightwing is a very popular character. He was once Robin and has now grown into his own hero. His acrobatic skills and his own unique style of fighting make him stand out. Also, Poison Ivy can be quite popular. Her connection with nature and her ability to control plants give her a distinct power set. She can be both an ally and an enemy to Batman depending on the story. And then there's Commissioner Gordon, who is a crucial link between Batman and the law in Gotham, and his presence in the fanfic adds a sense of realism to the otherwise fantastical world of Batman.
Well, in 'batman badass fanfic', Catwoman is quite popular. She has that alluring and mysterious quality that makes her an interesting addition. Her relationship with Batman, which is a mix of love and rivalry, is always a great plot point. Alfred, Batman's loyal butler, is also a favorite. He is not only a source of wisdom and support for Batman but can also have some badass moments of his own, like when he defends the Batcave. And of course, Bane is often in these fanfics, known for his brute strength and his iconic battle with Batman in the comics.
Alfred is a character that can't be ignored in Batman scars fanfics. His loyalty to Batman is unwavering, and he might be the one to nurse Batman back to health after getting the scars. His father - like figure could be emphasized more as he tries to help Batman come to terms with the physical and emotional changes. Another character could be Bane. He might see the scars as a sign of Batman's fallibility and challenge him to a more brutal fight, testing Batman's limits both physically and mentally.
Robin, in all his incarnations, is also a popular character in fanfiction related to Batman. He represents the sidekick aspect and the growth and development that comes with it. In Batman Beyond, Commissioner Barbara Gordon also features prominently in some fanfictions. Her connection to the original Batman era and her role in the new one can be explored in interesting ways.
Batman himself is of course extremely popular. He is the central figure, and in 1939 fanfiction, people love to explore different aspects of his character, like his detective skills and his relationships.
Harry Potter and Batman themselves are often combined. Fans like to see how the Boy Who Lived would interact with the Dark Knight. Hermione is also a popular character to bring into these crossovers. She could share her vast knowledge with Batman or use her magic to help him in his crime - fighting.
In many of these fanfics, the tinker taylor is of course a main character. They are often portrayed as highly skilled individuals, maybe with a bit of a rough exterior but a heart of gold. Sometimes, there's also a sidekick character, like a young apprentice who learns from the badass tinker taylor.
Lucy is also quite popular. She has a unique magic ability and her character growth throughout the fanfictions is interesting. She might start off as a bit of an outsider but gradually becomes an integral part of the group at the academy.
One popular type of original character in these fanfics is the tech - genius sidekick. They provide Batman with new gadgets and strategies to use against the Joker in his revenge plot. These characters usually have a unique backstory, like being an outcast in the tech world but finding purpose in helping Batman. Also, there are the street - smart informants. They know the seedy underbelly of Gotham and can give Batman valuable information on the Joker's whereabouts.
Batman himself is obviously very popular. His dark and brooding nature contrasts well with the more colorful X - Men world. Also, Wolverine is often a fan favorite in these crossovers because of his tough - guy attitude.
Obviously, Batman and Spider - Man themselves are very popular. But also, characters like Robin from Batman's side and Mary Jane from Spider - Man's side often make appearances. They can add a different dynamic to the story, whether it's a romantic sub - plot or a side - kick adventure.
Catwoman often features prominently. Her complex relationship with Batman, both as an adversary and sometimes an ally, makes her a fan favorite in fanfiction. The tension between them adds a lot of drama to the stories.