One possible motive could be self - defense. Maybe Ares was about to harm Percy's friends or family, and Percy had no other choice but to fight back and end up killing him.
Well, it would create a huge power vacuum. Ares was one of the major gods, and his death would surely shake up the balance of power among the gods. Other gods might start jockeying for his territory or influence.
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.
There could be. Fanfiction allows for all kinds of wild ideas. Given that Percy is a character in the Harry Potter series and Voldemort is the main villain, it's not surprising that someone might come up with a story where Percy manages to kill Voldemort. It might be a really unique read, delving into how Percy, with his own set of skills and personality traits, could achieve such a feat.
Yes, there might be such fanfictions in the vast world of fan-created content. However, it would be a rather dark and non - canonical take on the relationship between the characters, as it goes against the general narrative where they are more often allies or rivals in a less fatal way.
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.