I don't know for sure as it's a fanfiction. But it could be Lincoln Loud as he is one of the central characters in The Loud House and often involved in various storylines. Maybe he's the one getting the second chance.
Well, in a fanfiction like this, the main characters could be a combination of the regulars from The Loud House. It might be that Lincoln and one of his sisters, like Luna, are both involved. Maybe Lincoln gets a second chance at a music competition that he lost before, and Luna helps him out this time. Or it could be that the focus is on the parents in the story, and they get a second chance to do something for their family, like plan a better family vacation. There are so many possibilities when it comes to fanfictions and which characters are made central to the plot.
Since it's a fanfiction, it could be about a lot of things. It might be that a character who was previously excluded from an event in The Loud House now gets a second chance to participate. For example, if there was a competition that a character couldn't enter before, now they get another shot. The story could explore how they prepare this time, the new friends or allies they make in the process, and how they face the challenges differently compared to the first time. It could also be about a character getting a second chance at love, like a character who had a crush on someone but things didn't work out initially, and now they have a new opportunity to win the person's heart.
The main characters would likely be the Loud family members. Lincoln Loud, being one of the central characters in the original 'The Loud House', would probably also play a significant role in the fanfiction. His sisters like Lori, Leni, Luna, etc., would also be important as they each have their own distinct personalities and quirks that can be explored further in the fanfiction.
Most likely the main characters would be the Loud family members as it's related to 'The Loud House'. So, characters like Lincoln, Lori, Leni and the rest of the sisters could be the main focus.
Obviously, the Loud siblings could be the main characters. Lincoln, being the only boy, might take on a special role like a Pokemon trainer trying to prove himself. His sisters, like Lori, could also be strong trainers with their own unique Pokemon teams.
It could be Goku. Since he's the main protagonist in DBZ, often in fanfictions he's central even when the theme is about a second chance. He might be the one getting the second chance or be involved in someone else's second - chance story.
The main characters are Luna and Sam. Luna is from the Loud family, known for her love of music, especially rock. Sam is another character who shares Luna's passion for music. They often interact in the fanfiction, and their relationship is the central focus, whether it's a friendship or something more romantic.
Most likely, the main characters would be the Loud siblings. They are at the center of the 'Loud House' series, so in a fanfiction about changing the baby, they would probably play important roles.
Sometimes, even the family pets or the neighbors can be focused on in fanfictions related to this episode. They could be the ones who help Lincoln figure out what's really going on with his bad luck or they could be affected by his luck in some comical ways.
Well, it could be the children of the original Loud House characters. For instance, Lincoln's son or daughter might be a main character, carrying on some of his traits like his leadership skills or his ability to handle a large family dynamic.
Obviously, the Loud family members would be the main characters. Lincoln, being the main character in the original series, would probably play a crucial role in this fanfiction too. He might be the one to come up with plans to deal with the situation of being left in the dark.