One idea could be to create a male oc who is from a small, hidden village that has a unique jutsu passed down through generations. He could come to Konoha to learn more about different ninja techniques and end up forming a team with some of the original Naruto characters. His backstory could involve a family secret related to the village's past.
Perhaps an OC that is a foreign ninja from a far - off land with a completely different fighting style based on music. They use sound waves to attack, defend, and even hypnotize opponents, much like how Jiraiya uses his toad - related jutsu in creative ways.
A villain oc who is a half - human, half - beast hybrid. They were outcast from society because of their appearance and now seek revenge on all the villages. They have unique physical abilities due to their hybrid nature, like super strength and enhanced senses. Or perhaps a villain oc who is a former student of a great ninja but turned against their teachings. They create their own new and dangerous form of ninjutsu that goes against the traditional ways.
An interesting approach for a 'Naruto Reborn OC Fanfic' would be to create an OC who is an outsider to the ninja world but has to adapt quickly. This OC could be from a far - off land where they have different fighting styles or powers. For instance, a place where they use music as a form of combat, and when they come to the Naruto world, they have to blend in while also introducing their unique skills. They could form unexpected alliances and face challenges that are different from what the native ninja are used to.
You could create a Root OC who has a unique relationship with Danzo. Maybe they are starting to question his extreme methods and are on a journey of self - discovery within the strict and secretive Root. This would add an interesting internal conflict as they have to balance their loyalty to Root and their growing moral compass.
A possible plot is that the cat OC is a magical being from a different dimension. It gets lost in the Naruto universe and Naruto helps it. In return, the cat OC teaches Naruto some unique chakra - control techniques that it has from its own world, which gives Naruto an edge in battles.
One idea could be an OC who is a master of a unique water jutsu in Kirigakure. They could be on a mission to uncover a long - lost secret about the village's founding. Another could be an OC who is trying to reform Kirigakure's harsh shinobi training system from within. Maybe an OC with a special bloodline limit that is feared by others in the village at first but then they prove their worth.
One idea could be that your OC team is assigned a special mission to explore an ancient, forgotten ninja temple. Inside, they discover a powerful and dangerous jutsu that other villages are also after. Another is that they have to protect a visiting diplomat from another ninja village who has a secret that could change the balance of power in the ninja world.
One plot idea could be that the male OC is a transfer student to the Ninja Academy in the Hidden Leaf Village. He has a mysterious past and strange powers that the other students are curious about. As he tries to fit in, he discovers a dark secret about the village's founders that some people are trying to keep hidden. Another idea is that the OC is a wandering ninja who comes across Naruto and his friends on a journey. He has a special ability to heal wounds that no one else can, and he joins them to help in their fight against the Akatsuki.
A hobbit OC fanfic could focus on a young hobbit who dreams of leaving the Shire to become a great warrior. They set out on a journey against the wishes of their family and face many challenges. Along the way, they meet different races like elves and dwarves and learn from them, all while trying to prove themselves in a world that doesn't expect much from hobbits in terms of combat.
One idea could be creating an OC that is a hybrid of different Pokemon types. For example, a Pokemon with the features of a water - type and an electric - type. This could lead to unique abilities and an interesting backstory about how it came to be. Another idea is to have an OC that is a trainer from a far - off, unexplored region. This trainer could have different training methods and a whole new set of Pokemon not commonly seen in the main Pokemon world. You could also make an OC that is a Pokemon with a special power related to emotions, like it can heal other Pokemon's wounds when they are sad or boost their power when they are happy.