Their relationship could develop through shared battles. When they fight side by side against common enemies, they start to trust each other. For instance, in a fight against a group of dark mages, Natsu and the female demon realize that they complement each other's fighting styles. Natsu's brute force combined with the female demon's more strategic and stealthy attacks make them a powerful duo.
In this fanfiction, it may be that the little demon girl is lost in the forest and Natsu stumbles upon her. At first, she might be scared or hostile towards him, but as time passes, they develop a bond. Natsu could then take it upon himself to help her find her way back to her own kind or a place she belongs, all while they encounter different challenges like dangerous spells or other unfriendly beings in the forest.
Natsu might be a powerful wizard with a big heart. The little demon girl could be an outcast among her kind, which is why she's alone in the forest. There could also be other side characters like Natsu's friends who might later get involved in the story when he tells them about the little demon girl.
I'm not sure who exactly Natsu is just from 'natsu reads fanfiction'. It could be a normal person who just enjoys reading fan - made stories. Maybe it's a nickname for someone within a particular fan community.
Another plot could involve the female demon having a special power that Natsu needs to defeat a greater evil. Maybe she has the ability to control time briefly, and a dark wizard is trying to use this power for his own evil deeds. Natsu has to convince her to use her power for good and help him stop this wizard. Along the way, they develop a deep friendship and mutual understanding.
In the 'natsu went mia in war fanfiction', Natsu is presumably a central or important character. He could be a hero - type figure who was expected to play a significant role in the war. It's possible that he has some special abilities or traits that made his presence crucial. Since he went MIA, the whole story might be about his friends or allies trying to find him or dealing with the aftermath of his disappearance. It could also be that Natsu is a character with a complex backstory, and his going missing in action is a key event that will unfold and reveal more about his past, his relationships, and the overall world of the fanfiction.
Well, Romeo is often depicted as a passionate character. In the context of a fanfic, he might show intense emotions towards Natsu. Natsu, on the other hand, could be shown as strong - willed yet having a soft side when it comes to Romeo. But it really depends on how the author interprets them in the fanfic.
He could marry an original character created specifically for the fanfiction. This character could be a powerful mage from a far - off place who crosses paths with Natsu during one of his adventures.
Often, it could be because of a false accusation. Maybe someone framed Natsu for a crime he didn't commit, like stealing a powerful magical artifact from the guild. So, to maintain peace and order, the guild leaders had no choice but to banish him.