One idea could be an OC who has a special talent for art and uses it to transform the drab environment of the dumping ground into a more colorful and inspiring place. This OC could organize art projects with the other kids, bringing them together and giving them a sense of purpose.
Perhaps an OC who is a mystery - they arrive at the dumping ground with a hidden past and strange abilities. The story could unfold as the other characters try to figure out who this OC really is and where they came from. This could involve a lot of suspense and discovery throughout the fanfiction.
To create a believable character, start with a clear backstory. For example, if your OC grew up in a rough part of town before coming to the dumping ground, that could influence their tough - as - nails attitude and street smarts. Give them flaws too, like being overly stubborn or having a fear of heights. This makes them more human.
Perhaps a story where the Avengers are split into two factions due to a misunderstanding. Each side believes they are doing the right thing and they end up in a huge battle ground clash. This could explore the relationships between the characters and how they resolve their differences.
Another plot could revolve around an OC who is a Spartan trainee that doesn't quite fit the mold. They have a different way of thinking and approaching combat. In Halo 4, they end up being the key to solving a mystery related to the Prometheans. Maybe they find a way to communicate with the Prometheans and convince some of them to stop fighting the humans.
One idea could be an Otsutsuki OC who comes to Earth not for conquest but to study the unique life forms here. They could befriend some of the local ninjas and learn about the concept of friendship, which is alien to the Otsutsuki. This would lead to a series of adventures where they have to protect their new friends from other more hostile Otsutsuki members.
One idea could be an OC who is a long - lost relative of Moana. This OC could have been separated from the family during a great storm years ago. They could have unique skills, like being able to communicate with a different type of sea creature that Moana has never encountered. This would bring new adventures as Moana and the OC try to figure out how this new discovery could help their island.
One idea could be exploring the origin of the OC in the covenant world. Maybe they have a special power that sets them apart from the regular covenant members.
One idea could be an OC who is a new Wolfblood in a pack and has to prove themselves. Maybe they have a unique power that the others don't have and they have to learn how to control it while fitting into the pack's hierarchy.
One idea could be an OC who is a long - lost relative of one of the main characters. They suddenly show up and cause a stir in the power dynamics. For example, if they are related to the main heir, they might have a claim to the inheritance as well, leading to all kinds of family drama and power struggles.
One idea could be an OC who is a brilliant but unorthodox medical student. They constantly clash with House in their diagnostic methods yet prove to be surprisingly accurate at times. For example, they might use a new technology or approach that House is initially skeptical about but later comes to respect.
One idea could be an OC with the power to manipulate time joining the Incredibles. They could use their power to prevent disasters or even go back in time to change events that led to Syndrome's rise. Another idea is an OC who is a super - fast healer. They could play a crucial role in patching up the Incredibles after tough battles.