There might be some other characters like his friends at Hogwarts. They could play important roles in helping Jaime deal with the situations related to 'Fates Fool'. For example, a clever and loyal friend who is good at researching ancient magic texts.
One idea could be Jaime Potter discovers a hidden prophecy related to 'Fates Fool' that changes his whole perspective on his destiny. He might then embark on a journey to find out more about it, facing various magical challenges along the way.
I'm not entirely sure specifically what this fanfiction is about as there could be many different interpretations. But generally, it might explore the idea that Harry has a much grander and more complex origin as the son of the Fates. This could lead to him having an extraordinary role in the wizarding world that goes beyond what we saw in the original books. It might also delve into the idea of fate itself, how it affects not only Harry but also the other characters in the story, and how they interact with this new Harry who has such a special heritage.
Well, of course, Harry Potter himself is likely to be one of the main characters. He would probably play a role in either guiding or competing with the fates - chosen champion. Hermione Granger might also be there, using her vast knowledge of magic and books to help decipher any mysteries related to the champion's fate.
Obviously, Harry Potter would be one of the main characters. Since it's about him being the son of the Fates. Hermione and Ron would probably also be important as they are his closest friends in the original story and would likely be involved in his new adventures related to his special origin.
Some fanfictions play with the idea of Jaime's relationship with his family in the context of the Potter family. For example, how would his loyalty to his family compare to the love and loyalty within the Potter family? It creates a complex web of relationships and moral dilemmas that are really interesting to explore.
Perhaps a plot where the fates - chosen champion is from a different magical culture altogether. For example, from a far - off land where magic is practiced in a more elemental way. They bring their own set of spells and beliefs, which causes a stir in the Hogwarts community and also leads to new alliances and rivalries among the students.
There's a fanfiction where Jaime Lannister becomes a professor at Hogwarts in the 'Harry Potter and Jaime Lannister fanfiction'. He teaches a class on combat magic, using his own real - world fighting knowledge. Harry Potter and his friends are initially skeptical but soon learn a great deal from him, leading to some exciting adventures around the castle and in the Forbidden Forest.
He could marry a foreign princess. This would bring a new dynamic as she might have different cultural values and beliefs, which would create interesting storylines as Jaime adjusts to being with her.
One interesting plotline could be an alternate universe where Jaime decides to fully turn against Cersei much earlier. He might expose her secrets to save the realm from her tyranny, leading to a complex power struggle within King's Landing.