Well, it could lead to a whole lot of drama. Percy might resist at first, causing conflict within the fanfiction world. Maybe he has feelings for someone else, and this forced marriage would create a love triangle situation.
Well, Percy could also try to expose the wrongdoings of those forcing him to marry. If there are any illegal or unethical reasons behind it, by bringing it to light, he might be able to get out of the forced marriage.
It could be a jealous demigod. Maybe someone who has always been envious of Percy and Annabeth's relationship and popularity. This person finds a way to manipulate some dark magic or an old rule to force them into marriage, hoping to create chaos in their lives.
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.
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.
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.
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.
Well, one possible plot could be that some powerful outside force, like an ancient god or a magical entity, forces Annabeth to marry Percy for some grand scheme. Maybe it's to unite two powerful bloodlines or to fulfill an old prophecy. And they initially resist but as they face the situation together, they start to discover new feelings for each other.
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, in this fanfic, Percy would be in a tough situation. Hestia is the goddess of the hearth, and she's very different from Percy. If forced to marry her, Percy might first feel a sense of duty towards the gods. But then his adventurous spirit would likely kick in. He could start exploring ancient laws or prophecies to break the bond. And his relationship with other characters would be strained. For example, Annabeth would be really shocked and might be jealous or just worried about Percy.