Power comparison is a common theme. Writers often like to see how Natsu's magic stacks up against Naruto's ninja techniques.
Another theme is the clash of different worlds. Natsu is from a world of magic and Naruto from a world of ninjas. So, how these two different worlds' concepts interact during their fight is often explored. For example, how Natsu's concept of guild loyalty might compare to Naruto's concept of village loyalty. It makes for some really interesting character - driven moments in the fanfic.
Friendship is also a theme that can be found. Sometimes, the fight is a way for them to understand each other better and eventually become friends or at least respect each other. This shows how two very different characters from different universes can find common ground through their combat and the experiences they have during it. It's really cool to see how the authors develop this aspect in different ways in various fanfics.
One common theme is the exploration of family bonds. Since Kushina is Naruto's mother, their fight can be a way to understand each other better on a deeper level. Another theme is the passing of the torch, like Naruto showing how far he has come as a ninja compared to his mother's time. Also, self - discovery often plays a role as Naruto might learn something new about himself during the fight.
Another theme is redemption. Sometimes in these fanfics, Madara has a chance at redemption through his fight with Naruto. Naruto's belief in people's goodness can influence the outcome in such scenarios.
One common theme is self - improvement. Both Sakura and Naruto are constantly striving to get better in these fanfics. For example, Sakura might be trying to improve her combat skills to be on par with Naruto. Another theme is friendship. Despite their rivalry, their underlying friendship is often explored. It shows that they can compete and still care for each other.
Friendship is also a big theme. Naruto values his friends deeply, and Natsu is the same in his own way. Fanfictions usually explore how their friendship would develop if they met. They would likely bond over their shared love for a good fight and protecting their loved ones. For example, they might team up against stronger enemies that neither could face alone.
Well, the theme of discovery is quite common. This could be the discovery of new magical powers, either by the OC or through their adventures with Natsu. Also, the theme of family is often present. The OC may be alone at first but then find a sense of family within Natsu's group or through their relationship with Natsu. And of course, there's the theme of magic, which is central to the whole Fairy Tail universe that Natsu is from.
A recurring theme is the idea of sacrifice. In some fanfics, either Lucy or Natsu might be in a situation where they have to sacrifice something for the other. This could be their own safety, a magical ability, or even their dreams. It shows the depth of their connection and how much they value each other.
One common theme is friendship. Natsu's relationships with other characters, especially female ones, are often explored in a deeper way in these fanfics. For example, how she bonds with her fellow guild members.
One common theme is power. When Natsu gets angry, his power often spikes or becomes uncontrollable. For example, his fire magic might flare up in a way he can't manage right away.
A common theme is growth. It often shows how Natsu grew as a person and as a wizard during his childhood. Another theme is friendship. Since he was in the guild as a child, his relationships with the other members, especially his peers, are explored.
One common theme is adventure. Natsu and Lucy often go on quests together in fanfics, facing various challenges. Another theme is love. Their relationship, whether it's budding or fully developed, is a central focus. And friendship is also important. They are part of a guild, so their bond as friends within the group and specifically between them is often explored.