His mom, Sally Jackson, could be a main character. She might be the one reading the books to baby Percy at first and then be there to answer his questions as he reads on his own later.
The plot might involve baby Percy not fully understanding some of the more complex parts of the books at first. But as he keeps reading, he starts to piece things together. For example, he might be confused about the Greek gods at the beginning, but then he gradually figures out who they are and what they do. He could also have his own little interpretations of the events in the books that are really endearing.
Obviously, the baby gods themselves could be main characters. Each with their own unique personalities and powers. For example, a baby god of the sea might be curious and mischievous like Poseidon. Another could be a demigod who discovers the baby gods and takes on the role of their protector. This demigod would have to deal with the challenges of protecting these powerful but inexperienced beings. And there could also be an older god who has an interest in the baby gods, either for good or bad reasons, and becomes a central figure in the story.
There could be Annabeth. She is Percy's close friend and often plays a crucial role in Percy's adventures. In a situation where Thor kneels to Percy, she might be there to witness it and offer her own thoughts or reactions.
There could be a new character, a jailmate of Percy. This character could be either a friend who helps Percy survive in jail or an antagonist who makes his life more difficult. For example, a tough guy who wants to bully Percy at first but later has a change of heart.
A young mermaid named Ariel could be a main character. She could be Percy's friend and help him explore the underwater world. She could teach him how to swim faster and find the best hiding places from the bigger sea creatures.
The baby might be a key to a long - forgotten mystery. It could be related to an ancient pact between the gods. Percy finding the baby could be a sign that something big is about to happen in the world of the demigods. The baby's identity could be slowly revealed as Percy and his friends investigate. It could be a symbol of hope or a harbinger of doom, depending on the circumstances surrounding its appearance.
Another character could be Annabeth. She might try to stop Percy from taking such extreme actions, or she could be on his side if she believes the hunters are in the wrong. Grover could also be there, trying to play the peacemaker between Percy and the hunters. And then there could be some new, made - up characters in the fanfiction, like a rogue hunter who sides with Percy or an antagonist within the hunters' ranks who pushes Percy to his limits.
There could be the typical Dragonborn - associated characters. Maybe characters like Delphine, who often plays a role in guiding the Dragonborn. Since Percy is now the Dragonborn, she might interact with him in different ways compared to the original game.
Aside from Percy, Silena Beauregard from the Aphrodite cabin could be a key character if she's still alive in the fanfiction's timeline. She might be conflicted about the kidnapping since she has friends outside the cabin. And of course, Grover could be involved too. He would sense that Percy is in trouble and try to use his nature - related powers to track him down.
Annabeth is a great choice. Her intelligence and strategic thinking could add a lot to the story. For example, when Percy and Grover are in a tight spot, she could come up with a clever plan to get them out. Another good character is Tyson. His strength and loyalty would be useful in battles and dangerous situations.