One idea could be that the OC is a powerful mage from a far - off land who crosses paths with Noctis during his journey. They initially clash due to different beliefs but gradually come to understand and support each other. Another could be the OC being a commoner who saves Noctis from a dangerous situation, and Noctis feels indebted to her and they form an unlikely bond.
Well, perhaps the OC is an assassin sent to kill Noctis but instead falls in love with him. This creates a lot of internal conflict for the OC as she has to choose between her mission and her new - found feelings. Or the OC could be a healer who joins Noctis' group and has a special connection with him that helps him unlock new powers.
A great plot idea could be that the OC is a time - traveler who has knowledge of Noctis' future. She tries to change certain events to prevent his tragic fate. As they travel together, Noctis starts to trust her more and more. Their relationship develops as they face various challenges and enemies together, and the OC's knowledge of the future gives them an edge in battles and decision - making.
An OC who is a kind - hearted and wise sage - like character would also work well. They could offer Noctis advice and spiritual guidance, and their calm demeanor could contrast with Noctis' more impulsive nature. They might start as friends but the relationship could deepen over time.
One idea could be exploring the backstory of an original character (OC) within the world of FF7. For example, an OC who is a SOLDIER trainee but has a secret connection to the Ancients. Another could be an OC who is a merchant in Midgar, dealing with the various gangs and Shinra's influence. And also, an OC who is a researcher studying the effects of Mako on the planet.
One idea could be creating an OC who is a powerful mage from a hidden village. They could join the main characters on their journey and use their unique magic to help in battles. For example, magic that can manipulate time briefly to give an advantage in combat.
One idea could be Noctis arriving in the RWBY world and having to learn about Dust and how to use it in combat. Maybe he teams up with Team RWBY to fight against a new type of Grimm that his unique skills are well - suited to defeat.
One idea could be Naruto being summoned into the world of FF14. He might initially be confused but quickly adapt his ninja skills to the new environment. For example, his ability to use chakra could be translated into a unique form of magic in FF14.
One idea could be a crossover where Noctis visits Hogwarts. He could be mistaken for a new kind of wizard with his unique powers. Maybe he gets sorted into a house, like Gryffindor for his bravery, and then he has to learn about magic in the wizarding world while also sharing his own skills with the students.
There could be a Noctis OC fanfiction where the OC is a skilled assassin who initially has a contract on Noctis but then ends up becoming his ally. This OC might have a tragic backstory that led them to the life of an assassin, and through their interactions with Noctis, they learn about loyalty and friendship and start to fight for a greater cause rather than just for money.
One idea could be that the OC is a healer who stumbles upon Frankenstein's monster in the woods. The OC decides to help the monster, despite the danger, and they form an unlikely bond. This could lead to a story of redemption for the monster and a journey of self - discovery for the OC.
Maybe the OC is a scientist who has developed a device that can temporarily steal The Flash's speed. At first, the OC uses it for personal gain, but then realizes the chaos it's causing in the city. They then team up with The Flash to take down other villains who are after the device. Or, the OC could be a meta - human with the ability to see the future in flashes. The Flash initially doesn't trust the OC, but as they start to have the same visions, they have to work together to prevent a major disaster from happening.
The OC could be a psychic who is unknowingly drawn to Derry because of Pennywise's presence. Their psychic powers allow them to sense Pennywise's energy but not fully understand what it is at first. As Pennywise tries to manipulate the OC, the OC starts to fight back using their psychic abilities, creating a battle of wills and powers that could span across different dimensions within Derry, from the sewers to the abandoned houses and the mindscapes of both characters.