A common theme is the exploration of Nico's character. Fanfiction writers often dig deep into Nico's personality, his insecurities, his strengths. And the reader character is usually the catalyst for this exploration. Another theme is the power of connection. Whether it's a romantic or platonic connection, it's shown to be very powerful. For instance, in some fanfictions, the connection between Nico and the reader is what saves them from a dangerous situation.
Friendship is a very common theme. These three characters are often depicted as having a strong bond that helps them through various difficulties. For example, in many fics, they rely on each other during battles or when facing internal demons.
One common theme is the exploration of their contrasting natures. Nico, with his dark and brooding side, and Annabeth, with her logical and strategic mind. Fanfictions often play on how these differences can either clash or complement each other.
One common theme could be the exploration of their relationship dynamics. Since they are two distinct characters, the fanfiction might focus on how they interact, understand each other, and grow closer. Another theme could be adventure - related, where they go on quests or face challenges together while their relationship develops in the background.
One common theme is friendship. Many fanfictions focus on how they become friends despite their differences. Another theme is self - discovery. As they interact, they often learn more about themselves.
One common theme is redemption. Nico has a complex past, and often in these fanfictions, Will helps him find a sense of redemption. Another theme is acceptance, as they both accept each other's flaws and differences.
A common theme is friendship evolving into something more. Since they start as comrades in the Percy Jackson series, fanfics often explore how their relationships deepen romantically. Another theme is the struggle with their different powers and how they support each other in using and controlling them in new situations.
A frequent theme is the power balance. Given their different powers and abilities, how a female Percy and Nico interact in terms of who takes the lead in different situations. Also, the theme of acceptance is there. Nico's somewhat dark nature and Percy's more upbeat female self have to accept each other. In many fanfictions, they grow to understand and respect each other's differences, which is a central part of their relationship.
Adventure themes are often seen as well. The OC and rio nico might embark on some exciting adventures together, facing challenges and growing stronger both individually and as a pair during these experiences.
One common theme is the power - dynamic. Naruto has his own set of powers and Robin has hers. Fanfictions might play with how these powers interact or complement each other. Another theme could be about cultural exchange, as Naruto's world and Robin's world in One Piece have different cultures.
Adventure is also a big theme. Since they are part of the Straw Hat Pirates, fanfictions often show them facing new challenges and exploring new islands together. Their relationship blossoms during these adventures as they rely on each other's strengths.