Well, it could be about the Loud family getting sucked into the Kingdom Hearts universe. Maybe Lincoln could be the main character who teams up with Sora. They'd go on adventures across different Disney - inspired worlds within the Kingdom Hearts setting, while also trying to find a way back home. Along the way, they might meet some of the Loud sisters who also got trapped and they all use their unique skills to fight off Heartless.
The Loud kids are known for their distinct personalities. Lincoln is resourceful, and when combined with the Jamaji characters' adventurous spirit, they could lead the group in any situation. For example, if they were in a jungle - like setting in Jamaji, Lincoln could use his wits while the Jamaji characters use their local knowledge. Lori, being bossy, might initially clash with some of the more laid - back Jamaji characters, but eventually learn to work together.
One cool plot idea could be the Loud family getting transported into the Kingdom Hearts universe. Lincoln could team up with Sora to fight the Heartless. Maybe the sisters would each have a unique role, like Luna using her music skills to soothe some of the more aggressive enemies. Another idea is that the Keyblade could choose one of the Loud siblings as its new wielder, leading to a whole adventure of them learning to use it and save both their world and the Kingdom Hearts worlds.
I think Lincoln would be the most interesting. He's used to handling a big family and all kinds of chaos at home. In the Kingdom Hearts universe, he could use his adaptability and problem - solving skills. He'd be curious about the new worlds and the magic there, and his journey of discovery would be really engaging to read about as he teams up with Kingdom Hearts characters.
For Lincoln in this crossover, you can focus on his resilience from 'No Such Luck'. Despite all the bad luck he had, he still tried to keep a positive attitude. In the crossover, put him in difficult situations where he has to use that same tenacity. For example, if they cross into a dangerous new world, he could be the one motivating the others.
Writers study both sets of characters carefully. For example, if they are doing a Kingdom Hearts 3 and Harry Potter crossover, they would re - watch the Kingdom Hearts cutscenes and read the Harry Potter books. This way, they can ensure that Sora remains his optimistic, brave self, while Harry is still the determined and intelligent wizard. They also look at how the characters react to different situations in their original stories and try to replicate that in the crossover. If Sora is put in a situation like a wizard's duel in Hogwarts, he would likely approach it with his usual sense of adventure and a bit of naivete.
Link is often a silent and determined hero. In a crossover, his quiet determination can contrast well with the more outspoken characters in RWBY. For example, Ruby's bubbly and enthusiastic personality could be a foil to Link's stoicism. Weiss' haughty nature might initially clash with Link, but over time, she could come to respect his skills. Blake's more reserved and mysterious side might find common ground with Link's own quiet demeanor. Yang's bold and brash personality could be a source of both conflict and growth for Link as he learns to be more expressive.
Some characters might blend well. For example, Twilight Sparkle's studious nature could mesh with Izaya's inquisitive side. However, they also have differences. Izaya is more manipulative while Twilight is more about learning for the good of others. Another pair could be Celty and Fluttershy. Celty is a bit of an enigma and Fluttershy is shy. But they could bond over their gentle natures. Celty's unique form might initially startle Fluttershy, but she could come to accept it.
In this crossover, the Naruto characters are often more emotional and expressive compared to the Gundam Wing characters. The Naruto characters' open display of friendship and loyalty could be a new concept for some of the Gundam Wing pilots. For instance, the relationship between Naruto, Sasuke, and Sakura is very different from the relationships in the Gundam Wing world. However, the Gundam Wing pilots' sense of duty and honor could also be something that the Naruto characters come to respect. This blend of different personality traits could lead to a lot of character growth and interesting interactions throughout the fanfiction.
For example, Naruto's positive and determined personality would contrast with some of the more cynical Hetalia characters. Naruto is always looking for the good in people and striving for his goals no matter what. Some Hetalia characters, like Prussia, are more self - centered and prideful. But they could also blend as Naruto's enthusiasm might inspire Prussia to be a bit more altruistic. On the other hand, a character like Italy's laid - back nature could either annoy Naruto at first or make him relax more. Italy might also be in awe of Naruto's strength and determination.