It could be an exiled shinobi from a far - off land. Maybe they were wrongly accused in their own village and had to flee. They then come across Naruto and see in him the potential for change in the ninja world, so they decide to raise him with their own set of values.
Sasuke is also a likely candidate. The OC could try to understand Sasuke's pain and help him find a different path than revenge. Their interactions could be full of tension and deep conversations about power, family, and loyalty.
Aang could be an ally. Despite the OC being Ozai's son, Aang, with his forgiving nature, might see the potential for good in the OC. He could help the OC to understand the importance of balance and peace.
It could be a new character created by the author, like a young kunoichi from a small, far - away village. She might have special powers related to nature, like the ability to communicate with animals. This would make for an interesting dynamic when babysitting Naruto, as he's always been curious about different ninja abilities.
Ruby could be a great ally. She's friendly and always open to new people. Her combat skills and leadership in Team RWBY could also benefit the OC. Plus, her positive attitude might inspire the OC in their Gamer - related adventures.
Maybe an alien from a planet that was previously unmentioned in the MCU. This alien OC has a special connection to the power of the Infinity Stones and teams up with Thor because they realize that Thor is a key figure in the battle against Thanos. Their knowledge of the Stones could be crucial in the fight.
The Akatsuki could be potential villains. They are always on the lookout for powerful beings or things that can help them achieve their goals. If the OC has something they want, like a special chakra or a unique ability, they would be a threat. Another could be rogue ninja from different villages who see the OC as an easy target or a means to get something valuable.
One potential love interest could be Nigel. He's creative, well - connected in the fashion world, and has a kind heart beneath his tough exterior. An OC could be drawn to his passion for fashion and his ability to stand up to Miranda at times.
His mother Tsunade could be one of his first and most important allies. She would surely use her influence and skills to protect and guide him. Shizune could also be an ally, as she has been with Tsunade for a long time and would likely support the OC. Additionally, Naruto could be an ally, as he is known for befriending and helping out those in need in the ninja world.
A strong female ninja from a hidden village that was destroyed. She has a big heart and sees Naruto as a chance to start anew. She can teach Naruto her unique fighting style which is a blend of agility and powerful strikes.
A group of bandits could interact with the OC. At first, they might try to rob the OC but then realize that the OC has some unique skills that could be useful for them. So, they strike a deal. Also, an elven archer who is very distrustful of humans (including the OC) but gradually warms up as the OC shows respect for the elven culture. And a talking animal, like a fox, that is a bit of a trickster but also has a lot of knowledge about the secrets of the forest in this other world.