Adventure is also a popular theme. They might embark on a quest to save their world or discover a hidden treasure. This adds excitement and action to the stories.
One common theme is the exploration of power dynamics. Rhea being an ancient goddess and Percy a powerful demigod, their interactions often involve the balance of power. For example, in many fanfictions, Rhea might test Percy's limits or offer to enhance his powers in some way.
A lot of fanfictions also focus on the relationship between the two in a more emotional sense. Maybe Percy is lost and in need of guidance, and Rhea steps in as a mother - like figure. Or perhaps there's a more romantic undertone, which is a bit of a stretch given their different natures but makes for interesting stories.
One common theme is the exploration of power. Percy has his own set of powers, and Rhea is a powerful goddess. Fanfictions often look at how their powers interact or contrast. For example, in some stories, Percy's mortal - turned - demigod powers are pitted against Rhea's primordial goddess powers in interesting ways.
Since I'm not overly familiar with this specific fanfiction type, but generally in crossovers, themes could include adventure. Combining Naruto's world of ninja with Rhea's world (assuming she has a distinct world in her original context) might lead to exciting new adventures for the characters.
Common themes in 'naruto x rhea fanfiction' include the exploration of different cultures. Naruto's shinobi culture and Rhea's own world's culture collide and merge in interesting ways. Also, the theme of redemption can be present. Maybe Rhea has made some mistakes in her past and Naruto's positive influence helps her find a path to redemption. There's also the idea of growth, both in terms of their powers and as individuals as they face challenges together.
One common theme is identity. Since Percy has a different mother in these fanfictions, he often has to re - evaluate who he is. For example, in many stories, he might question his place among the demigods.
One common theme is the power imbalance. Since Rhea is an ancient goddess and Percy is a demigod, their different statuses often create interesting dynamics in the relationship. Another theme is the idea of forbidden love. In many fanfictions, their relationship goes against the norms or rules of the mythological world. Also, the theme of redemption is seen sometimes, where either Percy or Rhea has something to atone for and their relationship helps in that process.
One common theme is redemption. Since Rhea has had some controversial actions in the game, many fanfictions explore her path to redemption. Another theme is her past and the secrets she holds. Writers often use fanfiction to uncover more about her history.
One common theme is power and identity. Percy has to figure out who he is now that he's the son of Rhea and Chaos. Another theme could be family, as he might have to deal with his new family connections. And there's often the theme of adventure, as he uses his new powers in different quests or battles.
One key element is the relationship between Percy and Rhea. Since they are from different generations in the Greek mythology world, exploring how they interact is important. For example, Rhea being an older Titaness and Percy a young demigod.