If Tomura saved Deku, it might start a process of redemption for Tomura. Deku could try to understand him better and perhaps find a way to bring him to the side of good.
It could completely change the dynamics of the story. Maybe Deku would have a different perspective on villains and their motives.
It could lead to a major shift in the story's direction. Deku might have a different perspective on heroes and villains.
One idea could be exploring Tomura's backstory in more detail. Maybe show his life before he became a villain, his family situation, and what led him to the path of destruction. Another could be a 'what if' scenario, like what if Tomura was redeemed and joined the heroes. He could use his knowledge of the villains to help the heroes take down other threats.
It could lead to a major shift in the story's direction. Deku might have a different perspective on villains and heroism.
Give Tomura a new power or ability that is unique to your fanfiction. This will set your story apart from others. For example, he could have the ability to control time for a short period.
Dabi could be a great character to pair with Tomura. They are both villains and their powers and personalities could create some interesting interactions. Maybe they could team up for a particularly difficult mission or have a power struggle within the League of Villains.
There's also 'Growth Together'. This fanfic shows how Deku and Todoroki support each other during tough times at UA. They face challenges not only from villains but also from within the school. Their relationship develops as they help each other overcome these obstacles.
One idea for a Deku's Quirk fanfiction could be exploring what would happen if Deku's quirk manifested in a different way. For example, instead of having to gradually control One For All, he suddenly has full mastery from the start. This could lead to a very different story arc where he is immediately seen as a top - tier hero - in - training, causing envy and admiration in equal measure among his classmates.
One idea could be a fanfiction where Deku's quirk suddenly mutates. Instead of just having One For All, he starts to develop an additional power related to it, like the ability to share a fraction of One For All's power with his friends temporarily to boost their own quirks in a time of great need.
Well, in such a fanfiction, it could be due to various reasons. Maybe Ochako realizes that their hero paths are leading them in different directions. It might also be a plot device to create more drama and character development for both Deku and Ochako.
One aspect of Deku x Bakugou fanfiction is the exploration of their complex relationship. In the original series, they have a history of rivalry and conflict. Fanfiction often delves into how they might overcome these issues and develop a deeper bond. It could be through shared experiences in battles or personal growth moments. Writers might show Bakugou learning to respect Deku's growth and Deku seeing Bakugou in a new light.