How about a former Sith apprentice who has turned his back on the dark side? He's constantly haunted by his past deeds but is trying to use his knowledge of the Sith to help the Jedi. He has a complex personality, being both powerful and conflicted. He could be an interesting character in a Star Wars RP story as he tries to find redemption among the Jedi who are initially skeptical of him.
A Twi'lek mechanic who has a knack for fixing any ship but is secretly a Rebel sympathizer. She uses her skills to help the Rebellion by providing them with upgraded ships.
First, focus on the characters. Think about classic Star Wars archetypes like the Jedi, Sith, and smugglers. Then, consider a conflict, like a power struggle over a new planet or a lost Jedi artifact. For example, your story could start with a young Jedi apprentice discovering an ancient Sith holocron. This sets up a great conflict as they must decide what to do with it, facing the temptation of the dark side.
One idea could be a story about a young Ewok who befriends a group of Rebel Alliance soldiers. They could go on a quest to find a lost artifact that has the power to heal the forest moon of Endor. It would involve elements of friendship, courage, and the magic of the Star Wars world.
Perhaps Rey has a love story with a Jedi master from an ancient order. This master has been in hiding for years. When Rey discovers him, they begin to train together. Over time, they develop a romantic relationship as they pass on and learn Jedi knowledge from each other. Their love is a blend of mutual respect for their Jedi skills and a growing emotional bond.
A great plot idea would be to have a story centered around a group of younglings who are accidentally caught in the crossfire of a Clone Wars battle. They have to rely on their basic Jedi training and the help of some friendly clone troopers to survive. As they journey through the war - torn landscape, they grow and learn more about the reality of the war. Also, a story about a Separatist scientist who has a change of heart and tries to defect to the Republic with valuable information about new droid technology could be really interesting. He has to avoid being hunted down by his former allies while trying to make his way to the Republic lines.
One idea is to have a Jedi Council - like group in WW2. They could be made up of different leaders from the Allied and Axis sides who come together to find a more peaceful solution to the war. They would use their wisdom and leadership skills, similar to how the Jedi use the Force, to try and end the bloodshed.
One great character idea could be a smuggler who has a heart of gold but is forced to enter a dangerous 'play to win' situation. Maybe they have to compete in a series of space races to pay off a debt to a Hutt. Another idea is a former Sith apprentice who is trying to redeem themselves by winning a Jedi - sponsored competition. And a group of Ewok gladiators who use their natural agility and forest - dwelling skills to their advantage in a combat - based 'play to win' scenario.
Perhaps there's a fanfiction where a Star Wars character is transported to the Gundam universe. They bring with them their unique Force - related abilities, which are both a mystery and a potential source of power in the Gundam world. They could end up joining a Gundam squadron and using their Jedi training to enhance the squadron's combat capabilities.
One idea could be a story about a young family on a planet in the Star Wars universe. They discover an ancient Jedi artifact in their backyard which brings them into an adventure to protect it from the Empire. They meet some friendly rebels along the way who help them.
One plot idea could be that your SI OC is a young Force - sensitive being discovered by the Jedi Order, but they have a connection to an ancient Sith prophecy. The Jedi must decide whether to train them or fear their potential for darkness. Another idea is that your OC is a bounty hunter who gets caught in the middle of a power struggle between the Hutts and a new criminal syndicate. They have to use their wits and skills to survive and maybe even tip the balance of power.
One idea could be exploring the backstory of a minor character in Star Wars 1. For example, a young Padawan who was on the same Jedi training grounds as Anakin but had a very different path. Another could be a fanfiction that focuses on the political intrigue on Naboo before the Trade Federation blockade. Maybe there were some secret meetings or power plays that we didn't see in the movie. A third idea is to write a story from the perspective of a droid during the events of Star Wars 1, like how they experienced the chaos and battles.