It could be someone who hates the idea of Valkyrie and wants to stop Percy's mom from being a fan. Maybe a jealous god who doesn't like mortals being interested in Valkyrie.
Maybe Percy's mom gets inspired by the Valkyrie and becomes really brave. She could start training like a Valkyrie and teach Percy some of those skills.
In fanfiction, this could lead to some really interesting crossovers. Maybe Percy's mom having Kryptonian abilities could mean she has super strength or heat vision in a hidden way. It could add a whole new layer to Percy's story, like how she protected him in ways that were not just normal human ways but with some Kryptonian - like powers.
There is. You can often find them on fanfiction websites. These stories might explore the relationship between Percy and his mom Artemis in ways that the original series didn't. Maybe they'll show how Artemis would raise Percy differently from Sally, and how that would shape Percy into a different kind of hero.
Percy might become more independent. Without his mom's presence, he has to rely more on himself. He could start to take on more leadership roles within the demigod community. He also may develop a darker side to his personality, as the pain of his mom's death lingers. However, through his experiences and the support of his friends, he gradually learns to balance this new, harsher side with his original kind - hearted nature.
Grover could be a popular character. Since he's Percy's best friend, he might be involved in the fanfiction, perhaps helping Percy protect his mom or going on adventures with them. Another could be Annabeth. Her intelligence and skills could be useful in the stories, like when they are facing a difficult situation and she comes up with a clever plan.
A big theme is the re - imagining of Percy's powers. Instead of having Poseidon - like powers, he might have abilities more in line with Athena, such as enhanced mental abilities or the power to manipulate knowledge. There's also the theme of Percy's place within the Camp Half - Blood hierarchy. Since Athena is a major goddess, his status might be elevated or at least different, and this is often explored in these fanfictions.
One common theme is the exploration of Percy's new powers or abilities. Since Artemis has her own set of powers, Percy might gain some of those, like enhanced archery skills or a closer bond with nature. Another theme could be the change in Percy's relationships. His relationship with his friends and other gods would be different because of his new mom.
One possible plotline could be Percy's journey of grief and how he copes with the loss. He might become more withdrawn at first, then gradually find strength in his friends and his quest. Another could be his search for a way to bring his mom back, perhaps delving into dangerous magic or making deals with powerful beings. Maybe he also has to face the fact that his mom's death was part of a larger plan by the villains and he has to stop them from achieving their ultimate goal.
Perhaps there could be a plotline where Percy's mom's wizard heritage is somehow linked to the world of the gods. This could lead to a discovery that the two realms of magic and godly powers are more intertwined than anyone thought. It could also bring about a conflict where the gods are either threatened by her wizard powers or try to use them for their own purposes.