The Olympian council itself could be the antagonist if they are the ones forcing the marriage for their own political gain. They might not care about Artemis' wishes or Percy's attempts to stop it, and they use their power and influence to push the marriage forward.
Well, Percy is a resourceful character. In this fanfiction scenario, he could start by investigating the reasons behind being forced to marry Artemis. If it's some sort of plot by an enemy god, he'd work on uncovering it. He might also use his skills in combat and his connection to water to create some sort of diversion or escape plan if things get too tough. And he'd definitely have some internal conflict, given that Artemis is a virgin goddess and such a marriage goes against her nature too.
One possible storyline could be Percy trying to find a way to break the forced marriage. He might seek the help of the gods who are sympathetic to Artemis' situation. Another could be Artemis using her wits and powers to resist the marriage while Percy supports her from the sidelines. Maybe there's a prophecy involved that the marriage is a part of but they find a loophole.
Artemis would be in shock initially. Given her status as a powerful and independent goddess, the idea of being forced into marriage is unthinkable. She would likely try to use her divine powers to break free from the situation. If she can't do it immediately, she might start to negotiate. She could offer other things in exchange for her freedom from this marriage. And if Percy shows any sign of taking advantage of the situation, she would not hesitate to put him in his place.
In the 'Percy Jackson Forced to Marry Artemis' fanfiction, for the Greek pantheon, it could be a major upheaval. If Percy is forced to marry Artemis, it would change the power dynamics. Artemis' role as a virgin goddess is an important part of the pantheon's fabric. Her marriage could mean a shift in the roles and powers of other goddesses. There could be a breakdown in the traditional hierarchy. Some gods might see this as an opportunity to gain more power, while others would fight to maintain the old ways. This could also lead to new alliances forming, both among the gods and between the gods and certain demigods, which would completely transform the structure of the Greek pantheon as it was known before.
A possible plot twist might be that the force behind the marriage is actually an ancient evil that wants to use their union to gain power. Artemis and Percy then have to team up to not only deal with the unwanted marriage but also defeat this evil. It could also be that Artemis has a way to break the forced marriage bond, but in doing so, she would lose her immortality, which adds a huge moral dilemma to the story.
A group of dark forces or minor gods could be the antagonists. They might believe that the union of Percy and Artemis would disrupt the balance in a way that benefits them. So, they engineer the situation where Percy is forced to marry Artemis, hoping to use the resulting chaos to their advantage. They would likely try to keep Percy and Artemis from finding a way out of the forced marriage.
Well, one possibility could be that some powerful entity forces Percy into this marriage for political reasons. Maybe there's a power struggle in the mythological world and this union is seen as a way to bring stability. For example, Artemis might be against it initially because of her vow of maidenhood, but then she and Percy find a way to work together against the forced situation.
One possible plot twist could be that the gods interfere to stop the marriage at the last minute. They might realize that such a union goes against the natural order. Another could be that Percy discovers a way to break the forced bond by finding a magical artifact. Or perhaps Artemis herself finds a loophole in the situation that allows her to avoid the marriage without causing chaos among the gods.
Well, if we look at it, Percy might find himself in a very strange and uncomfortable situation. He is used to being a hero and dealing with quests and battles. But being forced to marry Aphrodite? It could lead to all sorts of comical yet also tense scenarios. For example, he might try to escape the situation using his demigod powers, or he could end up in a power struggle with Aphrodite as he tries to assert his own will against the goddess's desires.