There could be original characters created specifically for the fanfiction. These characters might be martial arts masters from far - off lands who come to train Izuku. They bring new fighting styles and cultures into the story, making it more diverse and interesting.
Katsuki Bakugo can be a popular character in izuku martial arts fanfiction. He might start as a rival in martial arts training, constantly challenging Izuku to improve. Their competitive relationship adds a lot of drama and tension to the story.
One popular trope is the 'Training Montage'. In these stories, Izuku goes through intense martial arts training, often with a strict mentor. It shows his growth and determination as he hones his skills. Another is the 'Underdog Triumphs' trope. Since Izuku is already an underdog in the original series, adding martial arts to his arsenal and then using it to overcome stronger opponents is a common and exciting plot.
Bakugo is often paired with Izuku in izuku time skip fanfiction. Their relationship, which was initially one of rivalry, can develop into a more complex and collaborative partnership over the time skip. They might learn from each other's strengths and work together to face powerful villains.
Naruto himself is often very popular. Writers love to take his already - powerful skills and develop them further in fanfiction. They might give him new jutsu or have him face even greater challenges to show his growth.
Bakugo could also be popular. In a lot of fanfictions, Bakugo's fiery personality clashes with Izuku's more stealthy ninja - like nature. Their interactions can create a lot of drama and interesting storylines.
Some fanfictions might include Uraraka's family members. Her parents could be involved in their married life, for example, giving Ochako traditional family advice. Also, Izuku's mother could be a prominent character, sharing her own experiences of being a single mother and now seeing her son happily married.
Izuku herself is obviously a very popular character in this type of fanfiction. Since the whole story revolves around her transformation into a girl. Her friends like Ochaco Uraraka also tend to be popular as they often play important roles in Izuku's new life as a girl. Their relationship might change and develop in interesting ways.
There are fanfictions where Izuku travels to a different dimension to learn martial arts. In this new world, he has to adapt to different fighting styles and philosophies. He could meet mentors who teach him the secrets of martial arts that are unknown in his own world. This not only makes him a better fighter but also changes his perspective on heroism.
Izuku himself is obviously a very popular character as he is the main focus. People are interested in seeing how he wields the power of the White Dragon Emperor.
One interesting story could be about Izuku Midoriya learning a unique martial art that gives him an edge in the hero world. For example, he might discover an ancient martial art that focuses on using the opponent's energy against them. This could add a whole new dimension to his fighting style and his journey to become a great hero.
Bakugo is often a key character. In many fanfictions, Bakugo's reaction to Izuku's evolving quirk can range from envy to begrudging respect. Their relationship is always a central focus, with Bakugo either trying to outdo Izuku or having to come to terms with Izuku's newfound power.