Some fanfictions might also explore themes of redemption or self - discovery. For example, Cobra could be on a path of redemption and female Natsu could play a role in that process, or vice versa. It gives depth to their characters and the relationship between them in the fanfiction.
A common theme could be friendship. Since they are both interesting characters from the same universe, many fanfictions might explore how they become friends despite their differences.
Another theme might be how the other characters in the story react to Natsu's transformation. Their shock, acceptance, or rejection can form an important part of the plot. For example, some friends might be very supportive while others could be confused or even hostile at first.
One common theme is friendship. They often start as just acquaintances or even rivals and then develop a deep friendship. Another theme is growth. Both characters, especially female Natsu, grow in terms of their powers and personalities. For example, in many fanfictions, female Natsu learns to control her new - found abilities better with Laxus' help.
A common theme could be friendship. Natsu and Gajeel have a complex relationship in the original series, and in fanfictions with a female Gajeel, exploring how she fits into that friendship dynamic can be interesting.
Romance is also a big theme. Many fanfictions play around with the idea of a romantic relationship between female Natsu and Gray. They might have some cute moments like blushing or secretly caring for each other.
One place to start looking for 'female Natsu and Cobra fanfiction' could be fanfiction.net. They have a large collection of various fanfictions. You can search for tags related to 'female Natsu' and 'Cobra' to narrow down the results.
Another theme could be the idea of redemption. If Cobra has a past that needs redeeming, Kinana can be the one to help him through it in the fanfiction. It's about how their relationship can be a catalyst for personal growth for both of them. For example, Cobra might learn to be more open and kind because of Kinana's influence.
Friendship - to - lovers is also a very common theme. They start as comrades or acquaintances and then gradually develop deeper feelings for each other. This often involves moments of self - discovery for both characters as they navigate their new relationship.
Since I'm not very familiar with this specific 'Lucy and Cobra Lemon' fanfiction, it's hard to say for sure. But generally, common themes in fanfiction can include friendship, adventure, and love. Maybe in these stories, there could be a theme of Lucy and Cobra Lemon facing challenges together and growing closer as a result.
Another theme is power exploration. Cobra has unique powers, and fanfictions often explore how he can further develop and use those powers in different situations. It could be in battles against new enemies or in helping the Fairy Tail guild in unexpected ways.
One common theme is the anticipation and excitement within the story's community about the new life. Another could be the challenges Natsu faces during the pregnancy, like dealing with her own powers or how her daily life is affected.