In a 'Percy Jackson has a son' fanfiction, the story could be about the son inheriting Percy's powers. Maybe he discovers his abilities in a similar way Percy did, like facing a monster at school. He could struggle to control his powers at first, leading to some chaotic but humorous situations.
Annabeth could be the mother. Since she and Percy have a strong relationship, it would be a natural choice. Their son would inherit both their intelligence and combat skills.
In this fanfiction, Percy is a character who is the son of Erebus. But without more context from the specific fanfic, it's hard to say exactly who he is beyond this basic family relation. He could be a new take on a well - known Percy from other mythologies or stories, with different powers and a different role to play because of his parentage.
One possible plot could be that Percy's son is starting at Hogwarts and is having a hard time living up to his father's reputation. He might struggle with the expectations placed on him due to his family name. Maybe he doesn't have the same academic prowess as Percy did at his age and has to find his own way to shine in the wizarding world.
The son could be cursed by a powerful being. Percy then has to find a way to break the curse. This could involve seeking help from old friends and new allies. Or perhaps the son has a premonition about a great danger coming to the world of demigods, and he and Percy have to convince the other demigods to take action before it's too late.
In many fanfictions, Percy being the son of a Titan can lead to some really interesting storylines. It might change his relationships with the Olympians. For example, he could be seen as a threat by some, or as a potential ally by others who want to use his Titan heritage for their own purposes. His powers could also be different or enhanced, perhaps having more control over primordial elements related to Titans.
One interesting aspect of Percy, son of Apollo fanfiction could be his relationships. He might have unique interactions with other demigods. For example, his bond with those from different cabins could lead to exciting adventures. Maybe he teams up with a child of Athena to solve a mystery that involves both Apollo's powers of prophecy and Athena's wisdom.
In some fanfictions, Percy could be made Artemis' son for creative and often unique plot twists. Fanfiction allows for a lot of creative liberties, so it's not unheard of. However, in the original Percy Jackson lore, there's no such relation.
Annabeth could be a strong ally. She's smart and has always been by Percy's side. Her knowledge and strategic thinking would be invaluable when Percy is dealing with the new aspects of his primordial powers.
One common theme is legacy. Since Percy is a well - known character, his son often has to deal with the legacy left behind. Another theme is self - discovery. The son is usually on a journey to find out who he is, especially in relation to his father.