Deku is definitely one of the most popular. Fans like to explore how his character would develop if he were female, especially considering his relationship with other characters like All Might and his classmates. Bakugo is also a common choice. Imagining him as a girl could completely change his hot - headed and aggressive personality, or at least how others perceive it. Ochaco is another popular character for gender - swapping. Her sweet and kind personality as a male could bring new dynamics to her relationships with the other characters.
All Might is a very popular character to gender - swap in the fanfiction. As a female, she could be a symbol of female empowerment in the hero world. Her relationship with Deku could take on a different, more motherly or sisterly role perhaps. Todoroki is also often gender - swapped. A female Todoroki could deal with her family's issues in a different way, and her dual - quirk situation might be perceived differently in terms of how she uses it. And of course, Momo. If she were male, his intelligence and quirk usage would be interesting to explore, especially in relation to how he would interact with the female characters in a different way.
Kirishima is quite popular for gender - swapping. If he were a girl, her loyalty and the way she forms bonds with others could be explored in a new light. Also, her physical appearance and how she presents herself as a female with a hardening quirk could be really fascinating. Another popular one is Tsuyu. As a male, his calm and collected nature could be emphasized more, and his role in the group could be different. And Jiro is also a character that many like to gender - swap. A male Jiro could have a different style of using his sound - related quirk and his relationships with the other characters, especially the female ones, would be different.
Definitely Deku. His journey from being a quirkless boy to a powerful hero gives a lot of room for creative interpretations in crack fanfictions. Writers can come up with all sorts of wacky scenarios for him, like getting a completely new and unexpected quirk.
One interesting idea could be how the characters' relationships change. For example, if Deku was a girl, his interactions with Bakugo might be different, perhaps less aggressive from Bakugo's side. Another idea is the change in character design. A female All Might might have a different style of hero costume, and her way of inspiring others could also be distinct. Also, the storylines could shift, like a female Todoroki dealing with her family issues in a more feminine - yet still strong - way.
Izuku Midoriya is often popular in these fanfics. Since he's the main character in the original series, writers like to explore how he would handle god - like powers. They might give him the ability to control all quirks at once or something similar.
All Might is quite popular in boku no academia fanfiction. His status as the former number one hero and his relationship with Midoriya attract a lot of attention. Writers might explore his past more deeply or create scenarios where he still has a more active role in the story. Uraraka Ochaco is also well - liked. Her cute personality and her feelings for Midoriya are often explored in fanfictions. And then there's Shigaraki Tomura. His role as a villain and his mysterious backstory make him a fascinating character to write about in fanfiction.
Todoroki is also a popular choice. His complex backstory and powerful quirk make him an interesting candidate for quirk swaps. Swapping his quirk with someone like Momo, who has a creation quirk, could lead to really unique storylines.
Another popular pairing might be Usopp and Mineta. Usopp's creativity with his gadgets and Mineta's rather unique quirk could create some interesting and comical interactions. They could get into all sorts of wacky adventures together in the fanfiction world.
Well, Uraraka is quite often written about. Her sweet personality and her crush on Midoriya are elements that many fanfiction writers like to play with. Shigaraki is also a common character in fanfiction. His role as the main villain in the series makes him a focal point for exploring the darker side of the boku no hero academia universe. And All Might, being the symbol of peace in the original story, is also frequently written into fanfictions, whether it's about his past or his influence on the new generation of heroes.
One common theme is identity confusion. When the characters' personalities are swapped, they often struggle with who they are now. Another theme is the impact on relationships. Since their personalities are different, their interactions with others change significantly.
Well, obviously Mandalay herself is a main character. Then there could be her fellow heroes like Tiger. Students she mentors might also be main characters, like Kota who she has a connection to in the original story.
In 'My Hero Academia gender swap fanfiction', a frequent theme is the adaptation of the characters' personalities. Since gender can influence how one behaves in society, authors often tweak the personalities of the gender - swapped characters. Also, the theme of breaking gender stereotypes is common. Characters who were typically male - coded or female - coded in the original may break those molds in the fanfiction, showing that heroism or villainy isn't tied to gender. There's also the theme of how the overall world of My Hero Academia, like the hero agencies and media, would react to these gender - swapped heroes.