One possible plot could be that Little Joe and Marie face various challenges together as they grow up. Maybe they have to deal with family issues, like Little Joe's family having some financial problems and Marie helps him come up with ideas to solve them. They also could explore the countryside around them, having adventures and creating memories along the way.
Perhaps the plot involves Little Joe and Marie growing up in a small town. They attend the same school, where they initially don't get along. But as they grow older, they start to understand each other better. Marie might be really good at art and Little Joe at sports, and they teach each other their skills, gradually becoming very close friends who support each other through all of life's ups and downs.
The main characters are obviously Little Joe and Marie. Little Joe is likely a boy who is growing up, and Marie is another character who is growing up alongside him.
In this fanfiction, Percy might also have to deal with his own sanity. Growing up in Tartarus, the constant threat and the dark, desolate place could be a huge mental strain. He could struggle with nightmares and hallucinations, and part of the plot could be about him overcoming these mental challenges while trying to find a way back to the world above.
One possible plot could be that they become really good friends as they grow up. They might study magic together, share secrets about Hogwarts. Daphne could help Harry understand the Slytherin way of thinking, which in turn helps him bridge the gap between the houses at school.
Maybe Little Joe is kidnapped by a con artist who plans to ransom him. But the con artist doesn't realize how tenacious the Cartwright family is. Little Joe tries to escape on his own but has to deal with the kidnapper's henchmen. Meanwhile, the Cartwrights follow every lead and start to close in on the kidnapper's hideout. This would be a story full of suspense and action.
One possibility is that Harry's family in this fanfiction has deep roots in France. He could be part of a French wizarding family that has been keeping some big secrets. His growing - up years in France could be filled with learning about these family secrets and how they are connected to the larger wizarding world. He might also get involved in a magical competition that is only held in France among young wizards to prove his worth.
When the little girl grew up, she became an excellent warrior and fought tirelessly to protect the world. She knew that she was shouldering a great mission, so she was always vigilant and cautious. Although she had been betrayed and hurt, she had never given up her pursuit of justice and her desire for world peace. She firmly believed that only through unwavering struggle could she finally realize her ideals and mission.
One possible story could be that Percy learned to be extremely self - reliant. He might have made friends with stray animals on the streets, like a dog or a cat that became his constant companion. He would have to find food and shelter on his own, perhaps by doing odd jobs for kind - hearted shopkeepers.
If there was a 'Callie and Marie Fart Fanfic', it could be a story where they use their 'farting' in a unique way. For example, they might discover that their farts can be used as a form of communication or as a power to defeat some sort of enemy. It could start with them being horrified by this new and strange phenomenon, but then they learn to embrace it and use it to their advantage in a very imaginative and silly plot.
Well, it could involve Stein being initially shocked but then very protective of Marie. Maybe they face challenges from their friends or the community they are in because of the unexpected pregnancy.
In some fanfictions, Harry might form a very close bond with another orphan who has latent magical abilities. They could explore the world of magic together in secret, long before he gets his Hogwarts letter. For example, they might find a hidden passage in the orphanage that leads to a small magical realm where they practice basic spells.