Some of the powerful demigods could be antagonists too. They might be jealous of Percy and his relationship with Artemis. They could try to stop Artemis from getting Percy back by creating obstacles or spreading false rumors about Percy. Maybe they want to be the ones to go on quests with Artemis instead of Percy.
The other gods might be antagonists. For example, Zeus could be against Artemis getting Percy back because he doesn't trust Percy or he has his own plans for Percy that don't align with Artemis'. Another god like Ares could also be an antagonist as he might see Percy as a threat and not want him to be on Artemis' side.
One possibility is that Artemis realizes Percy's unique skills and abilities are crucial for a quest she has in mind. Maybe there's a powerful enemy emerging that only Percy can help defeat. So, she tries to convince Percy to join her side again, perhaps offering him some kind of reward or appealing to his sense of heroism.
One common antagonist could be an old enemy of Artemis who doesn't approve of her marrying Percy. This enemy might be a powerful Titan who sees their union as a threat to his plans for revenge against the gods.
It's quite a wild concept for Artemis to want a baby with Percy in fanfiction. If it were to happen, it could be a part of an alternate universe type of fanfic. The author might have to deal with the reactions of other characters in the Percy Jackson universe. For example, how would Athena, who is often at odds with Artemis, react? And Percy himself would have a lot of internal conflict, considering his loyalty to Annabeth in the original stories. So, while it's an out - there idea, it could lead to some really complex and engaging fanfiction stories.
It could be some rogue Titans who escaped from Tartarus. They want to cause chaos in Oklahoma and use Percy and Artemis to their advantage. Maybe they plan to capture them and use their powers to break free the other Titans.
You can try fanfiction platforms like Archive of Our Own (AO3). There are a large number of Percy Jackson fanfictions there. Just use the search function and look for ones related to 'Fem Percy' and maybe even include 'Artemis' in the search terms if you want stories that specifically connect to Artemis's want. It's a great place to start exploring.
The antagonists could be some rogue scientists who are experimenting on demigods like Percy. They might be trying to harness the powers of the demigods for their own gain, whether it's for power, wealth, or some other self - serving reason.
The Titans could be the main antagonists. Even though they have been defeated before, some of them might have found a way to return or their followers could be causing trouble. They see Artemis as a threat or a target for their revenge against the gods. Another possibility is a new group of powerful monsters that have banded together and are specifically targeting Artemis for her power and influence among the demigods.
If Artemis wants a baby with Percy in fanfiction, it could change the power dynamics in the story's world. Artemis might become more protective and less involved in her usual activities as a goddess. Percy, on the other hand, might gain some new powers or abilities related to Artemis's domain. For example, he could have a stronger connection to nature or the ability to control wild animals. This could also create a new set of enemies for them, as some might see their union as a threat to the existing order.
The relationship between Artemis and Percy is quite unique. Artemis is a powerful and independent goddess, and Percy is a heroic demigod. The idea of them interacting in a fanfiction can lead to very interesting power dynamics and character development. It's like mixing two very different yet strong personalities.
One possible storyline could be that Artemis sees the potential in Fem Percy as a powerful female figure in the demigod world. Maybe she takes Fem Percy under her wing to train her in unique ways, away from the more traditional male - dominated training in Camp Half - Blood. This could lead to Fem Percy developing new skills and a special bond with Artemis.