If Ruby and Weiss swap personalities, their relationship could become more competitive. Ruby (with Weiss's personality) would constantly strive to outdo Weiss (with Ruby's personality) in combat and academics. The once harmonious friendship might have more friction as they both try to prove themselves in different ways.
If Ladybug and Chat Noir swap personalities, their relationship could become more competitive. Ladybug, with Chat Noir's personality, might try to one - up Chat Noir, who now has her more serious side. This could lead to some interesting banter and a re - evaluation of how they see each other.
First, study the original characters thoroughly. Know their traits, backstories, and relationships. Then, when swapping their personalities, think about how their new traits would interact with their existing circumstances. For example, if you swap Midoriya and Bakugo, Midoriya's new aggressive personality would likely have a different impact on his relationship with All Might, who was used to his meek self.
One idea could be to swap Ruby and Weiss's personalities. Ruby, with Weiss's more uptight and rule - following nature, would be strict about combat training and protocol. Meanwhile, Weiss, with Ruby's carefree and enthusiastic personality, would be more likely to charge into situations without over - thinking. This would create a lot of humorous and interesting character interactions.
If Batman is in Wonder Woman's body, his relationship with Aquaman could change. Aquaman is used to dealing with Wonder Woman in a certain way, but now he'd sense a different approach. Batman would also have to navigate Wonder Woman's relationship with the gods. This could be a huge challenge for him as he doesn't have the same connection to the divine. When Wonder Woman is in Batman's body, she would change how Batman is perceived by Commissioner Gordon. Gordon might find this new 'Batman' more approachable and less brooding. And she would likely have a different way of dealing with the rogues gallery in Arkham Asylum.
The relationship with the Hokage would be altered too. If Naruto is Hanabi, he would be part of the Hyuga clan's dealings with the Hokage. Hanabi as Naruto would be in a position of great influence. The Hokage would expect her to act like Naruto, but she would bring her own Hyuga - influenced mindset to the role. This could cause both confusion and new opportunities for the village's leadership and decision - making processes.
Percy and Annabeth's relationship could be affected. If the fanfic showed them in a bad light or had them break up, it might make them a bit self - conscious in their real relationship. On the other hand, if the fanfic showed their relationship in an overly - romanticized way, they might feel pressured to live up to that. Grover and Percy's friendship might also change. If the fanfic made Grover seem less important, Percy might have to reevaluate how he treats Grover in real life.
Arya Stark and Sansa Stark's relationship could also shift. If the fanfic showed them in different scenarios that made them more understanding of each other's past actions, they might become closer. For example, if the fanfic delved into how both of them were just trying to survive in a harsh world in different ways, they could develop a new - found respect for one another.
Their relationships would change significantly. For instance, their friends might be very confused at first. Spider - Man's friends would see the Wasp acting differently in his body, and vice versa. Their romantic relationships, if any, would also be affected. They would have to explain the situation to their loved ones, and it could lead to some awkward or comical moments.
If Naruto is in Sakura's body, his relationship with Sasuke might change. Sasuke might be initially confused by the 'new' Sakura's more Naruto - like behavior. Naruto might also have a different perspective on how Sakura views Sasuke. For Sakura in Naruto's body, her relationship with Kakashi could be different. Kakashi might notice the change in 'Naruto' and be more cautious. Also, Naruto's friends like Shikamaru might be puzzled by the sudden shift in 'Sakura's' personality.
I think all of the main characters in RWBY would have significant role changes in an age - swap fanfic. Ruby's leadership would be more seasoned, Weiss would have more power and influence in Atlas, Blake could be a more established Faunus rights advocate, and Yang would be more composed and a different kind of support for the team. Their relationships with each other would also be different, which would further change their roles in the story as a whole.