A popular theme is the 'fish - out - of - water' concept. Female Corrin is suddenly in the Naruto world, which is completely different from her own. She has to adapt to new customs, like the ninja way. For example, in her world, she might be used to more traditional forms of combat, but in Naruto's world, there are chakra and jutsus.
Friendship - building is another theme. Female Corrin forms bonds with Naruto, Sakura, Sasuke, and other characters. It's interesting to see how her personality meshes with theirs. For instance, if she is a kind - hearted character like Naruto, they might quickly become friends and support each other in their respective goals, whether it's saving the village or finding a way home for Corrin.
Power - exchange is also a common theme. Some fanfictions explore what would happen if Female Corrin shared her powers with Naruto characters or vice versa. This can lead to really creative scenarios, like Naruto using Corrin's Dragonstone powers in a battle against a powerful enemy. It changes the dynamics of the battles and makes for an exciting read.