In 'the Croods guy x oc fanfic', a common theme is discovery. The Croods guy and the OC might discover new things about each other, like hidden talents or fears. There's also the theme of growth. Both characters can grow as individuals through their interactions. For example, the Croods guy might become more open - minded because of the OC. Additionally, the theme of cooperation is often present. They need to cooperate to deal with threats, whether it's from nature or other pre - historic tribes.
Survival is also a key theme. The prehistoric setting means that the characters, both the reader and the Croods guy, have to constantly fight for survival. They need to find food, shelter, and protect themselves from the many threats around them. This theme often drives the plot forward, as the characters make decisions based on their need to survive. And in the process of surviving together, their relationship deepens, which ties in with the relationship - building theme.
I'm not sure which specific 'the Croods guy x oc fanfic' is really good at the moment. But you could start by looking at the reviews and ratings on different fanfic websites. Usually, the ones with high ratings and positive reviews are worth reading. Maybe the stories where the OC has a special skill or trait that complements the Croods guy would be interesting, like if the OC is really good at inventing things and helps the Croods survive in a new way.
One popular 'the croods guy x reader fanfic' might be 'A New Adventure with the Croods Guy'. It often has the reader inserted into the prehistoric world of the Croods, sharing exciting experiences with the male lead. They might go on a hunt together or discover new lands.
Another theme is the exploration of a different side of the Inuyasha universe. The OC can bring new perspectives. Like if the OC is from a different species or culture, it allows the author to expand on the lore. For instance, an OC who is a spirit might introduce new magic or powers that interact with Sesshomaru's world in unique ways.
A lot of 'kaneki x oc' fanfics explore the idea of redemption. Maybe the OC has a troubled past or has done something wrong, and through their relationship with Kaneki, they find a way to redeem themselves. Also, there are often themes related to power and control. Kaneki's own journey with his ghoul powers can be intertwined with the OC's story, especially if the OC is also a ghoul or has some special abilities.
Another theme is forbidden love. Given Draco's family background and the complex social structure in the Harry Potter universe, a relationship with an oc (who might not be from a pure - blood family or might be from a different house) would be seen as scandalous. Writers often explore how they navigate this social taboo.
One common theme is self - discovery. Brian often goes through a journey of self - realization with the help of the OC. For example, he might learn new things about his values or his place in the world.
It could be a fanfic that focuses on their relationship. For instance, how they first met and how their feelings for each other grew over time. Eep, being the adventurous one, might have initially caught Guy's attention with her boldness. And as they spent more time together, they realized they had a special connection.
One common theme could be mystery. Given the nature of the characters, there might be elements of an unknown backstory or a hidden connection between them that the fanfic explores. Another theme could be redemption, perhaps the purple guy trying to make up for his actions in relation to the puppet.
A common theme is self - discovery. The OC often discovers new things about themselves through their interactions with Jasper. For example, they might find out they are braver or more empathetic than they thought.