Caillou could be a catalyst for change. Maybe his presence in the Star Wars galaxy makes some of the warring factions re - evaluate their goals. Since he's just a child, his vulnerability could make the Rebels and the Empire realize that the war is affecting innocent lives, and they might start to look for more peaceful solutions.
He could be a new kind of hero. Maybe he crash - lands on a Star Wars planet and has to adapt. His ninja skills would be very different from the Force - based abilities, so he'd be an enigma at first.
He could fit in as an inventor. He'd use his skills to create new weapons or tools for the Star Wars characters. For example, he could make a better targeting system for the X - wings.
The Earth soldier could fit in by being a bridge between two different worlds. They could bring Earth's values and military ethics to the Star Wars universe. They might start off as a prisoner or a stowaway on a ship, but as they interact with the characters, they start to share their knowledge. Their unique perspective could help the characters in the fanfic to see things in a different light, like how to better defend a planet or how to negotiate with different species.
Well, it could be about Caillou somehow getting transported to the Star Wars universe. Maybe he meets the droids like R2 - D2 and C - 3PO and they go on an adventure together. He could be really confused at first by all the strange creatures and technology in the Star Wars galaxy.
Well, 'Solo: A Star Wars Story' fits in by providing more context to the galaxy far, far away. It shows us Han's formative years and his encounters that shape his character for later events in the main saga.
Well, in fanfiction, Ichigo could be a new kind of Force user. His connection to his zanpakuto could be like a Jedi's connection to their lightsaber, but much deeper. Since he has to constantly battle his inner Hollow, it could be like a struggle with the dark side of the Force. He might be recruited by the Jedi Order to help them understand this new type of power, or he could be seen as a threat by the Sith who want to corrupt him and use his power for their own gain.
In a Star Wars fanfiction, Robocop could fit in as a sort of inter - galactic law enforcer. He could be sent to the Star Wars galaxy by an unknown, highly - advanced civilization outside of the known galaxy. His mission could be to bring order to the chaos that often reigns in the Star Wars universe. He would have to adapt to the different cultures, species, and technologies. For example, he would need to understand the Force, which is completely foreign to his own technological origins. He might start to study it, thinking it could be a new form of energy to use in his law - enforcement duties.
They could potentially be introduced as a new threat. Maybe they find a way to cross over through some sort of interdimensional rift. The Sith's dark side powers would contrast greatly with the heroes in the MCU.
He could be a powerful outsider. For instance, he might arrive in the Star Wars galaxy by accident. His super strength and speed would make him a formidable force. He could either help the Rebels fight the Empire or be a target of the Sith who want to study his powers.
Well, Goku could be a powerful Jedi or Sith in a fanfic. His super strength and fighting skills would make him a force to be reckoned with. He might use his Ki abilities like the Force, and his Saiyan transformations could be seen as a new kind of power-up in the Star Wars world.