Well, perhaps a plot point could be the reactions of the Kwamis. When Adrien and Gabriel swap, the Kwamis that are used to one person's personality and way of doing things would have to adjust. For example, Plagg might be really confused with Gabriel in Adrien's body. Also, the way they use the Miraculous powers could change. Adrien might use the powers in a more positive and heroic way compared to Gabriel's more self - centered motives in the original role.
The father - son relationship would be completely turned on its head. Instead of Gabriel being the strict and often distant father, Adrien would be in that role. He might be more understanding and lenient towards himself (in Gabriel's body). And Gabriel, as Adrien, would have to deal with a father - like figure in Adrien's real father. This would create a very strange and new dynamic between them.
A plot could involve Adrien being given the Peacock Miraculous by a mysterious figure. With this new power, he tries to use it to protect a loved one from a new, powerful enemy. However, the power of the Peacock Miraculous starts to affect his emotions and he has to learn to balance his feelings while using the miraculous effectively.
One idea could be baby Adrien discovers a small Kwami - like creature in the garden. It's not a real Kwami but has some magical abilities. And as he plays with it, strange and cute things start to happen around the house.
Well, a plot could involve a villain creating a device that swaps their personalities. Ladybug might start making cat - related puns like Chat Noir usually does, while Chat Noir becomes obsessed with the details of plans and protecting the Miraculous like Ladybug. They then have to figure out how to reverse it while still fighting akumas in this new state.
In a Kwami swap fanfiction, a possible plot is that the swapped powers start to have unforeseen side effects on the holders' daily lives. Ladybug, for instance, might find it difficult to balance her normal life with the new Kwami - influenced powers. Chat Noir could be in a similar situation. As they struggle to deal with these changes, they also have to figure out how to reverse the Kwami swap. Meanwhile, the city is in more danger than ever as they are not at their full potential, and this could lead to some intense and exciting battles and rescue scenes.
One plot idea could be that Kagami and Adrien are paired up for a fencing competition. During their training sessions, they start to realize they have more in common than they thought. Kagami begins to understand Adrien's love for freedom outside of his strict model life, and Adrien admires Kagami's determination. This could lead to a budding friendship that might turn into something more, with the added complication of Ladybug in Adrien's life.
One interesting plot point is the characters having to adapt to new abilities. For instance, if Naruto swaps with Kakashi, he has to figure out how to use Sharingan properly. Another is the way relationships change. If Sakura swaps with Ino, they might understand each other's insecurities better. Also, the comical misunderstandings that can occur, like when a character doesn't know the habits of the body they're in.
Well, in Miraculous Kwami Swap Fanfiction, a cool concept is the shift in character dynamics. When the Kwamis are swapped, characters like Adrien and Marinette have to adapt to new powers and responsibilities. This can lead to some hilarious and heartwarming moments. Also, it might change the overall plot of the story as the heroes have different abilities and weaknesses. It's like a fresh take on the original Miraculous story.
Well, Poseidon in Percy's body could have a hard time fitting into the mortal world. He'd be used to his own grandeur and might find Percy's normal life quite challenging. For example, dealing with school and friends in a way Percy does would be new to him. Also, the interactions between the two while in each other's bodies, like how they communicate and try to reverse the swap, can be really engaging.
One possible plot could be that Marinette, in an overzealous attempt to get closer to Adrien, creates a 'trap' of sorts. Maybe she arranges for a photoshoot at a location where only she and Adrien are present, under the guise of it being a school project related to fashion. She could have set up the set in a way that Adrien would be impressed by her creativity and they would have an extended period of time to talk and bond.