Well, a big theme is the pursuit of power. These boy OCs want to be strong ninjas like Naruto. They train hard and face many challenges on their way to power. Also, the theme of acceptance is quite prevalent. They might be different from the normal ninja in the village, so they have to strive for acceptance from the villagers and their peers. For instance, an OC with a unique jutsu might be initially feared but later accepted.
One common theme is self - discovery. The oc often has to figure out their place in the Naruto world, their abilities, and their purpose. Another theme is friendship. Just like in the original Naruto series, the oc forms bonds with other characters, whether it's with Naruto and his friends or other original characters. Also, power - seeking is a theme. The oc may strive to become stronger, either to protect themselves or to achieve a certain goal in the ninja world.
One common theme is self - discovery. The OC often enters Beast Boy's world and in the process discovers new things about themselves, just as Beast Boy also learns more about his own feelings. For example, in many stories, the OC might be a new recruit to the Teen Titans and through her interactions with Beast Boy, she figures out her own strengths and weaknesses.
One common theme is the outsider status. Since the OC is a feline in a mostly human - dominated ninja world, they often feel like an outsider. This theme of not quite fitting in but still finding a place is very prevalent.
One common theme is the idea of acceptance. Naruto is often shown as accepting the oc for who they are, despite their differences or being an outsider in the ninja world. For example, if the oc has a strange power or comes from a different background.
One common theme is self - discovery. The original characters often have to figure out their place in Suna and their own abilities. Another is loyalty, either to the village or to their friends within Suna.
One common theme is identity. The oc characters often struggle with their place in the clan and in the Naruto world as a whole. Another theme is power. They usually have to develop or discover their unique clan powers. For example, in many fanfictions, an oc from a new clan might start off not knowing how to use their powers but gradually masters them.
One common theme is the clash of modern and traditional values. The OC usually comes from a modern world and has to deal with the very different values in the Naruto universe, like the importance of clan loyalty.
Another theme is the power of music. In these fanfictions, music can have various effects like healing, inspiring, or even controlling others in some cases. It's really interesting to see how the authors play with this concept within the Naruto universe.
One common theme is friendship. The oc girl often starts as a stranger to Naruto but they gradually become friends. Another theme is self - discovery. The oc girl might be on a journey to find out who she really is, and Naruto helps her in that process. Also, love is a theme in some of them, where the oc girl and Naruto might develop romantic feelings for each other.
One common theme is the struggle between ninja duties and personal relationships. Since they are in the Naruto world, they have to balance their love with their tasks as shinobi.