One great 'ares joxer fanfic' could be 'The Adventures of Ares and Joxer' which might explore their unlikely friendship. It could have them going on quests together and facing various challenges.
You can start by looking on popular fanfiction websites. For example, Archive of Our Own (AO3) has a large collection of fanfics from various fandoms, and you can search for 'ares joxer' there.
Well, a frequent theme is probably adventure. Since they both exist in a world full of action and mythical elements, many fanfictions would likely send them on some sort of journey together. And then there's the theme of character growth. Joxer might learn to be more confident or capable in the presence of the female Ares, and she might learn something about compassion or humility from him. It's also possible that some fanfictions explore the theme of identity, especially for the female Ares, as she may be different from the traditional male Ares in many ways.
Finding good 'female Ares and Joxer fanfiction' can be a bit of a hunt. You could also try reaching out to fan communities dedicated to the original work that these characters are from. They might be able to point you in the direction of some great fanfics. Some stories might explore a romantic relationship between them, while others could focus on a more platonic or adversarial relationship, depending on how the author wants to portray them.
You can try searching on popular fanfiction websites like Archive of Our Own (AO3) or FanFiction.net. Just type in the relevant keywords 'Ares Goddess of War Joxer' in their search bars, and you might find some interesting fanfictions.
One common theme is adventure. Joxer often gets involved in various adventures with Ares and other characters from the 'Goddess of War' universe. Another theme could be friendship or rivalry between Joxer and Ares.
Ares fanfic often features his fierce and war - like nature. His power and strength are usually highlighted. For example, in many fanfics, his battles are described in great detail.
Another way is to show a begrudging respect. Ares might respect Athena's intelligence in battle even though he is more impulsive. In the fanfic, there could be a scene where Ares witnesses Athena outwit an enemy with her wisdom, and he has to admit, albeit reluctantly, that she has her merits. Then, this could lead to a more complex relationship where they start to collaborate on some military matters.
A plot could revolve around a mortal who prays to both Ares and Athena simultaneously. The two gods are intrigued and descend to the mortal world. There, they find that the mortal's problem is a complex one that requires both war - like strategy and wisdom to solve. As they work together, they discover new aspects of each other and their relationship evolves.
One great 'Ares and Percy fanfic' is 'The Redemption of Ares'. In this fanfic, it explores a different side of Ares, showing his possible growth and change through his interactions with Percy. It's a really interesting take on their relationship, as it goes beyond the typical rivalry presented in the original works.