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 swapping the personalities of Deku and Bakugo. Deku could be bold and brash, while Bakugo might become more timid and self - doubting. It would create a whole new dynamic in their relationship and how they interact with other characters.
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.
Give them a strong motivation. For example, if they're seeking revenge for the death of a loved one, that can drive their actions. Also, consider their moral code. Maybe they think they're doing the right thing, even if it's considered evil by society. For instance, they might believe that the current hero system is corrupt and they're trying to expose it through their villainous acts.
You can develop their personality through their actions. For instance, if a character is always helping others, we can assume they are kind - hearted. Their reactions to different situations also matter. If they stay calm during a crisis, it shows their composure.
In the story, the characters can develop their communication skills. Since they have to act like each other, they need to communicate with the people in the other's life. This forces them to be more understanding and patient. Also, they may develop their problem - solving skills as they try to figure out how to swap back. All these experiences shape them into more mature and adaptable characters.
A Bakudeku personality swap fanfic can be really interesting. In such a story, the typically explosive and brash Bakugo might become more reserved and empathetic like Deku usually is. Meanwhile, Deku could take on Bakugo's confident and assertive traits. This swap can lead to unique character interactions. For example, their relationships with other classmates would change drastically. Bakugo, in Deku's body, might struggle with his newfound lack of physical strength at first but would likely use his strategic mind to compensate. And Deku in Bakugo's body could have to deal with the high expectations and the fear others have of Bakugo's power.
Starting an MLP Personality Swap Fanfic can be fun. Firstly, pick your characters for the swap. Maybe you want to do something really different like swapping the personalities of Discord and Tirek. Once you've decided, study the original personalities closely. For Discord, his chaotic nature would be replaced with Tirek's power - hungry and serious demeanor, and vice versa for Tirek. Then, come up with a plot. It could be about how the other ponies react to these sudden personality changes. You can start with a simple event that triggers the swap and then build the story from there, showing how the characters adapt or struggle with their new personalities.
Well, 'The Great Personality Swap in Naruto-verse' is a great read. In this fanfic, not only the main characters like Naruto have their personalities swapped, but also some of the side characters. It creates a whole new dynamic in the story. There's also 'Naruto's Altered Ego' which focuses mainly on how Naruto's swapped personality affects his relationships with others, like his friends in Team 7.
They can develop empathy. For example, if a rich character swaps with a poor one, they'll understand the hardships the poor face. So they become more empathetic towards others.
One popular trope is the 'fish out of water' experience. Bakugo, now with Deku's personality, has to adjust to being less physically capable but more emotionally intelligent. He might struggle to fit in with his former self's friends. Another trope is the newfound respect between the two. As they experience each other's lives, they gain a deeper understanding of one another. Also, the 'role - reversal' in hero training is common. Deku, in Bakugo's body, might show a different fighting style that combines Bakugo's power with Deku's strategic thinking.