The main characters are Leo and his dimensional counterpart. Depending on the setting of the fanfiction, there could be supporting characters. For instance, if Leo has friends or family in his own dimension, they might play a role in how he reacts to meeting his counterpart. Similarly, the counterpart could have his own set of associates that could add more depth to the story.
Well, in this fanfiction, Leo might be initially shocked to meet his dimensional counterpart. They could compare their different lives, skills, or even their relationships with other characters. Maybe they would team up to face a common threat that exists in both their dimensions.
Obviously, the main characters are the Flash Pain and Leo Valdez.
In such a fanfic, Naruto might initially be confused when he meets his counterpart. They could compare their lives, skills, and experiences. Maybe they would have a friendly spar to test each other's strength.
Obviously, Keith and his mom are the main characters.
The two main characters are Jon and his sister. Depending on the nature of the fanfiction, they could be very different in terms of character traits. One might be more outgoing while the other is more reserved. But the beauty of it is seeing how they interact and how their relationship unfolds when they meet.
In this 'kirk meets his father fanfiction', the two main characters are Kirk and his father. Kirk, who is often seen as a hero in many stories, and his father, whose presence will likely shape Kirk's character further. Their interactions, whether it's a simple conversation or a more complex exchange of ideas, will be at the heart of the story.
Obviously, Harry is one of the main characters. And his kids, although we don't know their specific names or personalities yet from just the title, are also main characters. There might also be his wife, who is an important part of the family and would likely be involved in the interactions with Harry and the kids.
In such a fanfic, Naruto might be initially confused by the presence of his female counterpart. They could start by comparing their jutsu skills. Maybe she has a different way of performing the Rasengan, which would be really interesting to see.
In a 'naruto meets his counterpart fanfic', a plot twist could be that the counterpart seems friendly at first but is secretly working for an enemy. Or perhaps the counterpart is a clone created by an old enemy of Naruto's with a different set of memories. It could also be that the counterpart has a connection to a long - lost part of Naruto's family that he didn't know about, which changes everything he thought he knew about his own identity.
Obviously, Batman himself would be one of the main characters. And of course, his parents, Thomas and Martha Wayne. There could also be Alfred, as he is an important figure in Batman's life and might play a role in facilitating the meeting or providing some insights afterwards.