One common theme is friendship. When Izuku is sick, his friends often come to his aid, showing the strong bonds in Class 1 - A.
Another theme is perseverance. Despite being ill, Izuku usually tries to keep going, whether it's training or dealing with schoolwork. It reflects his determination from the original series. For example, in many fics, he might be sick but still tries to participate in hero training sessions in some way.
One common theme is empowerment. Since female Izuku is often in a male - dominated world of heroes, these fanfictions usually show her rising above the challenges and proving herself. For example, she might have to face discrimination from some of the male characters at first but then shows them what she's made of.
A major theme is also the idea of support. The characters in the harem are often there to support Izuku in his journey to become a great hero. This can include emotional support, like when he's feeling down about his progress, or practical support during battles or training. And of course, there's the theme of love and attraction, which is a fundamental part of any harem story. Different characters in the harem will show their love for Izuku in various ways, whether it's through acts of kindness, protecting him, or just being there for him.
One common theme is growth. Both Izuku and Tsuyu are characters who are constantly evolving in the original series, and in fanfiction, this growth is often explored further. For example, they might grow not just as heroes, but also in their relationship with each other.
One popular 'boku no hero academia izuku sick fanfiction' is 'Sick Days' where Izuku is ill and his friends from Class 1 - A take turns to take care of him. It shows a different side of their relationships.
Often, a common element is a distorted view of Izuku's power. Maybe his One For All power goes out of control in a terrifying way. Another element could be that the normally friendly characters in the Boku no Hero Academia world turn against Izuku, creating a very scary and isolating situation for him.
Bakugo is often paired with Izuku. Their complex relationship can add a lot of drama to the detective story. Bakugo might be reluctantly helping Izuku or even be a suspect in the case Izuku is investigating.
Obviously, Izuku Midoriya is the central character. Then there are often characters like Ochaco Uraraka, who could be part of the harem as she has shown an interest in Izuku in the original series. Tsuyu Asui might also be included as she is a close friend and could potentially develop deeper feelings for Izuku in fanfiction.
One common theme is mystery - solving within the hero society. Detectives in these fanfictions often have to figure out who is behind certain villainous acts or strange occurrences. Another theme is the discovery of hidden powers or secrets related to the heroes. For example, a detective might find out that a hero has a secret ability that they've been hiding.
Another theme is the idea of heroism. Both shows revolve around heroes. Fanfictions might focus on how Ben 10, with his alien forms, would be perceived as a hero in the 'Boku no Hero Academia' world, or vice versa. For example, a fanfic could show Ben 10 using his powers to save UA students from a new threat. It also delves into what it really means to be a hero in different contexts.
A common theme is power. Both Naruto and 'boku no hero academia' deal with characters having unique powers. So, in fanfiction, it's often about how the characters' powers interact or compare. For example, Naruto's chakra control compared to the quirk control in 'boku no hero academia'.