In my opinion, Uraraka is a great character to focus on in a genderbend fanfic. As a male, he could have a different approach to his quirk and his relationship with Deku. Momo Yaoyorozu would also be interesting. If she were male, his intelligence and quirk usage might be perceived differently in the hero society. And of course, All Might. A female All Might would be a powerful and iconic character to explore in a genderbend universe.
Definitely Bakugo. His strong personality would be really interesting to see in a female form. Deku is also a popular choice as seeing his kind - hearted and determined nature as a girl could lead to some great storylines. Todoroki is another one. His complex backstory and powerful quirk would be fascinating when genderbent.
A gender - bent Hinata can be quite popular in these fanfics. If she is more assertive like a male Hinata might be, her relationship with Naruto (whether male or female in the fanfic) could take on a whole new dimension. Also, a female Kakashi has a certain allure, as fans are curious about how his character traits would translate to a female version.
Aang is often a popular choice. Genderbending him can lead to some really interesting storylines, like how a female Aang would handle being the Avatar in a male - dominated world of bending. Another popular one is Zuko. Changing his gender can add a whole new layer to his character arc, especially his relationship with his father and his journey of self - discovery.
Midoriya Izuku from BNHA is often popular. His determined and kind - hearted nature can bring a lot of interesting dynamics in the crossover fanfic. He might be the one trying to solve the mysteries and uphold justice in the Danganronpa - style plot.
Jaune is a character that many like to genderbend. His journey from a novice to a more skilled fighter can be re - imagined in a genderbent version. As a female, her insecurities and growth could be explored in a different light. Pyrrha is also a popular choice. Her skills and status as a champion in the original can be given a new spin when she is genderbent, perhaps with different relationships and interactions with the other characters.
One idea could be exploring how the characters' relationships change. For example, if Deku was a girl, how would her dynamic with Bakugo be different? Maybe Bakugo would be more protective in a different way. Another plot could focus on how the female versions of the male heroes deal with the challenges in the hero society, like discrimination that might be specific to female heroes. Also, a plot could revolve around a genderbend All Might and how she inspires the new generation of heroes.
Izuku Midoriya is often a popular choice. His growth and development in the original series make him an interesting character to explore in time travel scenarios. He could use his knowledge of future events to become an even greater hero faster. Bakugo Katsuki is also popular. His fiery personality can lead to some intense interactions when dealing with time - travel related situations.
Robert Sullivan is also a great choice. His leadership skills and his own personal demons, like dealing with past traumas, can be explored in fanfic. His relationships with the other members of Station 19, both professional and personal, can add depth to a story.
Pongo and Perdita are often popular. They are the parents of the 101 dalmatians and have a strong and loving relationship. Their leadership within the family and how they protect their puppies can be explored in many different ways in fanfic.
Dallas Winston is a favorite among many. His tough - guy exterior but complex emotions underneath are really interesting to write about. Fanfics can delve into his past that made him the way he is and how he really feels about his friends in the Greaser gang.