The theme of the underdog and the idol is also common. Izuku is the underdog, and the female pro hero is someone he looks up to. Their relationship then blurs the line between admiration and love. For example, if it's with Mirko, Izuku admires her brash and fearless fighting style. As they interact more, their relationship can change from that of a fan - idol dynamic to a romantic one. There can also be a theme of sacrifice, where either Izuku or the female pro hero is willing to sacrifice for the other in a dangerous situation.
One great place to find such fanfiction is Archive of Our Own (AO3). Just search for 'izuku x female pro heroes' there and you'll get a bunch of stories. Some popular ones often involve Izuku paired with Uraraka in a more heroic - duo - turned - romantic setting. Another might be Izuku with Mt. Lady, where the height difference and power dynamics can create really interesting stories.
One common theme is the transformation of their relationship from rivals to lovers. They start off being competitive and then gradually see each other in a new light. Another theme is the exploration of their individual growth as they are in a relationship. They learn from each other and become better versions of themselves.
Another theme is mentorship. Sometimes, female characters take on a mentorship role for Izuku. They might have different skills or knowledge that they impart to him, like unique fighting techniques or strategies.
One common theme is growth. They both face challenges that make them grow as heroes and as individuals. For example, they might have to learn new skills to overcome an obstacle.
Often, the theme of acceptance is strong. Izuku has to deal with a world that sometimes doesn't accept quirkless individuals as heroes. Jirou can play a role in making him feel accepted and valued. And vice versa, Izuku can accept Jirou for who she is, quirks and all. This mutual acceptance can lead to a deep emotional connection between them, which is often explored in fanfictions.
Often, a common theme is the idea of overcoming obstacles. In many fanfictions, there are external factors like other characters' opinions or challenges in their hero training that they have to get past to be together. Also, self - discovery is a theme. Female Izuku might discover new sides of herself through her relationship with Todoroki and vice versa. For example, she might become more confident in her feelings for him.
One common theme is the power of friendship. Since they are both students in the hero academy, they often start as friends and then feelings might develop. Another theme is the overcoming of differences. Izuku was born without a quirk initially and Todoroki has a complex family background and powerful quirk. They learn to understand and support each other.
A common theme is the transformation of their relationship from rivals to lovers. They often start off bickering and competing, but then gradually fall in love.
One common theme is the struggle for acceptance. Since she's a female in a world where the main character was originally male, she often has to prove herself more. Another theme is friendship. Female Izuku's relationships with her friends, like Bakugo or Todoroki, are often explored in new ways.
One common theme is growth. Both Izuku and female Todoroki are characters with a lot of potential, and fanfictions often explore how they grow together, not just in terms of their powers but also as people. For example, they might learn from each other's determination or kindness.