One idea could be creating an OC who is a long - lost relative of an existing character, like a cousin of Ryu. This OC could have a unique fighting style that combines elements of Ryu's Hadoken but with a different twist, like a lightning - infused version. Another idea is an OC from a different dimension who comes to the Street Fighter world to learn their fighting techniques. They could start off as a bit of an outcast but gradually gain the respect of the other fighters.
An interesting Street Fighter OC fanfiction idea is an OC that is a healer in the world of fighters. Usually, the focus is on combat, but this OC could use their skills to patch up the fighters after battles. They might get involved in the fighting themselves when they realize that some villains are targeting them to stop them from helping the good fighters. Their fighting style could be based on defensive moves and using medical tools as weapons, like injecting opponents with a numbing agent.
One idea could be to have Ruby Rose learn new combat moves from a Street Fighter character like Ryu. She could incorporate his hadouken - like move into her scythe attacks, creating a unique and powerful fighting style.
One idea could be a crossover between Street Fighter and a popular anime like Naruto. Imagine Ryu training with Naruto to master new forms of energy control. Another could be a crossover with the DC Universe, where characters like Chun - Li team up with Wonder Woman to fight a common enemy. Or perhaps a crossover with the world of Final Fantasy, with Street Fighter characters embarking on a magical quest in a fantasy realm.
One idea could be a crossover tournament where Naruto characters like Naruto, Sasuke, and Sakura enter the Street Fighter universe to compete. They could learn new fighting styles from the Street Fighter characters and form unique friendships or rivalries.
One idea could be Poison joining the Street Fighter tournament to prove herself. She might face off against some of the well - known Street Fighter characters like Ryu or Chun - Li. Another plot could involve Poison teaming up with a Street Fighter character, say Ken, to take on a common enemy that threatens both their worlds.
One idea could be that Naruto characters are transported to the Street Fighter universe and have to learn the fighting styles there. For example, Naruto might be intrigued by Ryu's Hadoken and try to incorporate it into his own Rasengan. Another could be a tournament where both Naruto and Street Fighter characters compete. Sakura could face off against Chun - Li, with Sakura using her medical ninjutsu in unique ways during the fight.
A third plot idea is a crossover with the 'Final Fantasy' universe. Ryu could be transported to a world filled with magic and monsters. He would have to team up with the Final Fantasy characters to fight against a common enemy, perhaps using his Hadouken in combination with magic spells.
A really interesting fan fiction could be about the backstories of the female fighters in Street Fighter. For instance, Chun - Li's journey to becoming a strong fighter while also dealing with the expectations of her family and society. You could explore her relationships with other characters and how she overcame various obstacles in her life to be where she is in the game.
Perhaps there could be a story where the dark forces in Mortal Kombat are trying to corrupt the pure - hearted characters in Street Fighter. Akuma might be a target for this corruption. The Mortal Kombat villains could offer him more power in exchange for his loyalty. The other Street Fighter characters would then have to try and save Akuma from this dark influence, and they might seek help from some of the more morally ambiguous Mortal Kombat characters.
One idea could be that the heroes from My Hero Academia are transported to the Street Fighter universe. They could participate in the Street Fighter tournaments, with their quirks adding a new dimension to the fights. For example, Deku could use his One For All to perform amazing acrobatic attacks.
One idea could be a story where Ryu and Chun - Li are forced to team up for an underground fighting tournament that has a mysterious organizer. They start off not getting along well because of their different fighting styles and philosophies. But as they face tougher opponents together, they begin to respect each other more and learn from one another.