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.
There could be Clarisse. Since she is Ares' daughter in the original Percy Jackson series, she might play an important role. She could be either jealous of Percy getting her father's attention or become a sort of mentor - like figure to him. Another character could be Annabeth. She might be worried about Percy being adopted by Ares and try to rescue him or at least check on him regularly.
In fanfiction, the concept of Ares being possessive of Percy can also stem from the idea of forbidden or complex relationships. The contrast between Percy's more heroic and noble nature and Ares' war - like and often brutish ways creates an interesting dynamic. Ares may view Percy as a symbol of what he can't be, and his possessiveness could be a way of trying to corrupt or change Percy to fit his own view of the world.
There's 'Ares and Percy: Allies in the Shadows'. This story delves into the idea of them working together secretly. It has some really cool action scenes and interesting character development for both Ares and Percy.
Since lemon fanfictions are inappropriate, I can't really discuss the common themes in them. But in general non - lemon Percy and Ares fanfictions might have themes like power struggle, as Ares is a god of war and Percy has his own powers. Another could be the clash of their personalities, with Percy's more heroic and selfless nature against Ares' more violent and self - centered one.
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.
It's hard to say. Percy has his wits and his special powers like controlling water. But Ares is a god, very powerful. If Percy can use his environment well, like creating a big wave to distract Ares, he might have a chance to win.
A theme that often comes up is the clash of ideologies. Percy, with his more modern and empathetic view, against Ares' traditional and often brutal view of war. Also, the theme of heroism is there. Percy is seen as a hero, and his battles with Ares can be seen as a test of his hero - status, with the fanfiction exploring different aspects of what it means to be a hero in that context.
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.
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.