Love or at least attraction could be a plot point. In some fanfictions, the contrast between the rough and violent Ares and the strong - willed fem Percy could lead to an unexpected attraction. This would be a complex relationship as they come from very different worlds and have different values, but it could add a lot of depth and emotion to the story.
A plot could also revolve around a mystery that involves both of them. Maybe there are some ancient artifacts related to war that are disappearing, and both fem Percy and Ares are suspecting each other while actually they need to work together to solve the mystery. This would create a lot of tension and drama in the fanfiction.
A common plot could be a power struggle. Since Ares is a god of war and fem Percy is a powerful demigod, there could be a constant jockeying for position. For instance, in a competition among demigods organized by the gods, Ares might try to undermine fem Percy to prove his own superiority.
One possible interaction in a fem Percy and Ares fanfiction could be a battle of wits. Fem Percy, being as clever as the original, might outsmart Ares in a strategic situation. For example, in a quest where Ares is trying to manipulate events for his own gain, fem Percy could see through his plans and turn the tables on him.
Well, it could be that Percy is fighting Ares to protect his friends. Maybe Ares has threatened Percy's loved ones in Camp Half - Blood, so Percy has no choice but to face the god of war.
Well, perhaps Percy has lost his original family or home in this fanfic. Ares, being the god of war, might see potential in Percy. He could adopt Percy to train him to be a great warrior. Percy might struggle with Ares' rough and war - like ways at first, but then gradually adapt and learn unique combat skills from him.
A possible plot could be that fem Harry Potter discovers she has some connection to the world of Greek mythology through Sally Jackson. Maybe she has to travel between the wizarding world and the realm of the Greek gods to solve a mystery that threatens both worlds. Along the way, she uses her magical abilities and the wisdom she's gained from Sally's influence to overcome obstacles.
Well, it could be about Percy discovering he has this unexpected connection to Ares. And then he has to deal with the reactions of his friends like Annabeth. Some of them might be distrustful of this new relation. Percy would then try to find out more about his connection to Ares through exploring old prophecies and ancient sites, all while trying to keep his regular demigod duties in check.
One possible plot could be that Ares and Aphrodite's secret relationship is somehow discovered by Percy and his friends. Percy then has to decide whether to expose them or use this knowledge to his advantage in the ongoing power struggles among the gods. Maybe Aphrodite tries to charm Percy into keeping the secret, while Ares threatens him. This would create a lot of tension and moral dilemmas for Percy.
In fanfiction, the relationship could be developed by exploring their family ties. Since Percy is a demigod and Ares is a god, there could be some underlying connection through the divine family tree. Maybe they discover that they are related in a more distant way than they thought. This could lead to Ares having a more protective side towards Percy, or Percy seeing Ares in a less antagonistic light. Also, they could be forced into a situation where they have to communicate their feelings and motives clearly, like being trapped in a magical prison together. This would make them open up and start to build a more complex relationship.
One plot idea could be that as the daughter of Ares, she has an inborn combat prowess. She could use her skills from the wizarding world, like magic, combined with her Ares - given strength and aggression in duels at Hogwarts. Maybe she gets into conflicts with the traditional pure - blood families who look down on her 'un - wizard - like' aggressive fighting style.
A plot could involve Ares testing Percy in a series of challenges that are not just about physical strength but also about his mental and moral fortitude. For example, Ares creates illusions of Percy's friends in danger, and Percy has to make difficult decisions. This would explore Percy's character deeper and also show a different side of Ares as a sort of cruel mentor. Or perhaps a story where Percy is accidentally transported to Ares' domain during a battle, and he has to find a way to escape while also dealing with the war - crazed creatures there.
A possible plot could be a competition among the demigods where Percy, as a 'Son of Ares' in this fanfiction, has to prove himself against other powerful demigods. The competition could include tasks like combat, strategy, and survival challenges. Along the way, Percy could learn more about the Ares - like qualities within himself and also form new alliances or rivalries.