It could be a new character who is a reluctant member of the Meta Liberation Army. They might have joined out of desperation but start to question the group's motives as the story progresses.
A third idea is to consider a post - war scenario in the 'boku no hero academia' world where the Meta Liberation Army is trying to rebuild. You could explore how they interact with the heroes and society now that the big battles are over. There could be attempts at reconciliation or more underhanded plots to regain power.
One idea could be exploring the backstories of the members of the Liberation Army in more detail. Maybe show how they came to join and their individual motives.
The main character could be an orphan with a rare and misunderstood quirk. They might face discrimination from others due to their quirk's odd nature, but in the orphanage, they find a sense of belonging. As the story progresses, they learn to master their quirk and prove that it can be a great asset in the hero - villain world.
It could be Deku. Imagine if Deku was also a hardcore gamer. He could use his knowledge of game strategies to analyze his opponents' quirks during battles, much like how he analyzes hero moves in the anime. This would give him an edge in combat and also add an interesting layer to his character.
Create characters with complex backstories that led them to the Liberation Army. Maybe a character was a victim of hero - villain battles that destroyed their home. This experience made them think that the current hero system is flawed and they joined the Liberation Army to change it. Their actions and decisions in the fanfic would then be shaped by this backstory.
Well, you could base it on a what - if scenario. What if the liberation of quirks led to a complete restructuring of society? In the fanfic, the heroes and villains might have to form new alliances. You could also make it about a group of students who secretly experiment with quirk liberation, thinking they can use it for good but things start to spiral out of control. This would add a lot of drama and conflict to the story.
It could be a new student at U.A. High School. Maybe someone who was a hardcore gamer in their previous life and now has to adapt their gaming skills to the hero world. They would have unique ways of approaching hero training and battles.
First, decide on the main concept of your quirk liberation. Is it a full - on revolution or a more gradual change? Then, choose a character or a group of characters to focus on. For example, if you pick Deku, think about how he would react to the idea of quirk liberation. Start with a strong opening scene that sets the tone, like a big event related to quirk liberation happening right away.
It could be Deku's successor. Maybe someone who idolizes Deku and has a similar quirk but with some new twists. They would carry on Deku's legacy and face new challenges in the future.
Sometimes, it might also feature well - known characters from the original 'Boku no Hero Academia' but with a psionic twist. For example, Deku could potentially develop some psionic abilities in addition to his One For All quirk, which would completely change his character dynamic and how he interacts with others in the story.