Well, the plot could involve the original character (oc) suddenly finding themselves in Luffy's world. Maybe they are reborn as a new member of the Straw Hat crew. They could have unique abilities from their previous life that help the crew in their adventures, like being able to sense danger more acutely or having a special knowledge of some hidden treasures.
In an 'oc reborn as luffy fanfiction', perhaps the oc is reborn right at the start of Luffy's journey. They could become friends with Luffy early on and influence the way he forms his crew. For example, they might suggest different strategies for battles or ways to recruit new members. The oc could also have their own dreams that somehow merge with Luffy's goal of becoming the Pirate King.
Well, it could be about an original character (oc) who dies in their own world and is reborn in the DC universe. Maybe they gain superpowers and have to figure out how to survive among the well - known DC heroes and villains.
Well, it could be about an original character (oc) who is reborn in the DxD universe and has to adapt to the unique rules and powers there. Maybe the oc discovers a new power within themselves that is unique to their rebirth.
One possible plot could be that the OC, reborn as a Senju, discovers new powers within the Senju bloodline. They might struggle to fit into the Senju clan at first due to different memories and personalities from their previous life. As they grow, they could befriend the young Hashirama and Tobirama, and play a role in the early development of the Hidden Leaf Village. Maybe they introduce some new ideas from their past life that help the Senju in their battles against the Uchiha.
Well, the plot could involve the OC being reborn with some special powers. Maybe they're reborn as an Asgardian but with a unique twist. They could then interact with the existing MCU characters like Thor or Loki, and get involved in their adventures, perhaps helping to stop a new threat to Asgard or even all of the Nine Realms.
In an 'OC reborn in Inuyasha fanfiction', the OC could be reborn as a normal human in a village near where Inuyasha and Kagome often pass by. They grow up hearing stories about demons and the half - demon Inuyasha. One day, they accidentally stumble upon Inuyasha and Kagome during one of their battles with a demon. Intrigued by their world, the OC decides to join them. Their unique perspective as a modern - day thinker (assuming they have some modern sensibilities reborn into this feudal - era world) could help Inuyasha's group in unexpected ways, such as coming up with new strategies to deal with demons or finding hidden Shikon Jewel fragments.
In this fanfiction, the OC reborn as the dark avatar might find themselves in the middle of a power struggle. There could be other powerful entities vying for control or trying to eliminate the threat of the dark avatar. The OC has to navigate this complex web of politics and power while also dealing with their own internal conflict about their new form and the darkness within.
Well, perhaps the OC in the fanfiction used to be a baker in a past life. After being reborn, they have an uncanny talent for baking that they don't fully understand at first. They open a bakery and attract all kinds of strange and wonderful customers. There could be a mystery element where the OC discovers that their baking has some kind of magical or emotional effect on people who eat it.
One possible plot could be that the OC, now as Ash, has all the knowledge from their previous life. They might use this to train their Pokémon more effectively. For example, they could quickly figure out the best training regime for Pikachu, making it even stronger than in the original series. They could also have different strategies in Pokémon battles, using their prior knowledge of different Pokémon types and moves to their advantage.
One possible plot could be that the male OC is reborn into the Uchiha clan during a crucial time in their history. He might discover he has unique abilities that set him apart. For example, he could have a special form of Sharingan that no one else has. He then uses this to protect the clan from unseen threats, all while trying to fit into the complex Uchiha society.
The plot could involve the original character (oc) being reborn in the DC Universe with new powers. Maybe they are reborn as a metahuman in Gotham and have to navigate the city's crime - filled streets while dealing with their newfound abilities and trying to figure out their place in this new world.