One possible plot could be that the future female Deku comes back in time to warn the present - day heroes about a powerful villain that will emerge in the future. So she has to convince them to take action and train harder.
It could be really interesting. Maybe in this fanfic, the future female Deku has unique powers and a different personality from the original Deku. She might be more confident and assertive, using her skills to fight in a new way. The story could involve time travel, where the present - day characters meet her and are shocked by her existence.
One possible plot could be Deku finding out his partner cheating through overhearing a conversation. He might be heartbroken and initially go into denial.
In 'deku meets future deku fanfiction', perhaps the future Deku warns the present one about upcoming threats. He could tell him about villains he'll face in the future and how to defeat them. This would give the present Deku an edge in his battles and also in his growth as a hero.
Deku could become more cautious. If his future self shows him some mistakes he made in the future, he would be more careful in his actions. For example, he might think twice before making a hasty decision in a battle. Also, he could gain a more mature perspective on life and hero - work, as he gets a glimpse of what lies ahead.
One possibility is that the novel might focus on the rebuilding of the Republic after some great conflict. There could be political intrigue as different species and factions vie for power and influence. And perhaps a new threat, not related to the Sith or the Empire, but something entirely different, like an alien race with a unique technology that challenges the established order.
I think Uraraka would be very excited. She has always been a big supporter of Deku. Meeting Future Deku would give her a chance to see how far he has come, and she might also get some inspiration for her own hero journey. Plus, she's a friendly and emotional character, so she'd likely be thrilled at the opportunity.
In this fanfic, it could be that Deku's quirk goes out of control during a training exercise. He loses the ability to contain his power and it ends up consuming him, resulting in his death. This would create a lot of self - reflection among the other students about the risks of their quirks and the importance of proper training and control.
One common theme is friendship. For example, in many 'deku female fanfic', Deku forms a deep and meaningful friendship with a female character. They support each other through tough times and grow together as heroes - in - training.
Another plot might involve the older Deku being from an alternate timeline. He shows the younger Deku different ways he could have developed his skills and relationships, which makes the younger Deku reevaluate his own path as a hero.
In a 'Villain Deku x Todoroki Fanfic', themes like betrayal could be prominent. Deku's turn to villainy could be seen as a betrayal of his friends and the hero ideals. Another theme is self - discovery. Todoroki might discover new things about himself through his relationship with Villain Deku. Additionally, the theme of acceptance is possible. Whether it's Todoroki accepting Deku as he is or Deku accepting his new role as a villain, it could add depth to the story.