I really like 'Etherious Natsu's Adventure'. This fanfic takes Natsu on a journey where he has to face some of the darkest secrets of his past as an Etherious. It's well - written with a lot of action and emotional moments. For example, there's a part where Natsu confronts a figure from his forgotten past, and the way it's described is really engaging.
There's also 'Natsu Dragneel: The Etherious Savior'. In this one, Natsu uses his unique Etherious abilities to save the Fairy Tail guild from a powerful new enemy. The author does a good job of exploring how Natsu's powers are different from other mages and how he can use them in creative ways.
Well, in these fanfictions, the concept of the Etherious is really interesting. It allows for a lot of creative exploration. For instance, we can see different interpretations of how Natsu's Etherious nature affects his relationships with other guild members. Some fanfictions show him having to struggle with his darker side, which makes for a great read. Also, fans love to see Natsu in new and exciting situations that the original series might not have covered, like facing ancient evils related to his Etherious origin.
A theme that is quite prevalent is the idea of sacrifice. In many fanfictions, either Natsu or Lucy is put in a position where they have to sacrifice something for the other. It could be their own safety, their magic, or their dreams. Also, the theme of growth is common. They both grow as characters, learning more about themselves and each other as the story progresses. This growth can be in terms of their magical abilities, but also in their emotional maturity.
One great 'etherious natsu dragneel and lucy fanfiction' is 'A Bond Beyond Magic'. It beautifully explores their relationship in a world where they face new and unexpected magical challenges together. The way it develops their characters and the unique magical situations they encounter make it a very engaging read.
Definitely Zeref. Since he has a connection to the Etherious and also to Natsu in the original Fairy Tail story. Another good character could be Gray Fullbuster. His ice - magic could contrast well with the more chaotic and dark powers of the Etherious. Also, Mavis Vermillion could be included. Her wisdom and powerful magic could play a role in helping Natsu deal with the Etherious side of things.
One idea could be Natsu from Fairy Tail finding himself in a parallel universe where he is an Etherious. He has to deal with the new powers and the darker side of himself while still trying to find his way back home. Another could be an Etherious teaming up with Natsu to fight a common enemy that threatens both their worlds. Maybe a powerful dark mage who wants to use the power of the Etherious and also destroy Fairy Tail.
There could be a mysterious old wizard who takes Natsu under his wing when he leaves Fairy Tail. This wizard might have knowledge of ancient magics that Natsu is eager to learn.
Another interesting plot could be that Natsu leaves Fairy Tail to follow in the footsteps of a long - lost relative who was also a powerful mage but had some sort of connection outside of the guild. Along the way, he meets new allies and enemies, all while the Fairy Tail members are trying to bring him back.
I've read one where Natsu and Female Laxus compete in a guild - wide tournament. At first, it's all about winning for themselves. But as the tournament goes on, they start to understand that they are both representing Fairy Tail. They begin to work together in a way, like when they face an opponent who is using dirty tricks. They combine their powers to defeat the cheater and in the end, they both gain a new respect for each other and for the guild.
One great 'Fairy Tail Child Natsu' fanfiction is 'Natsu's Childhood Adventures'. It delves into Natsu's early days in Fairy Tail, showing his interactions with the other members as a child. It's full of heartwarming moments and also some exciting battles against small - time villains.
One possible fanfiction could be 'The Abduction of Natsu' where a dark wizard kidnaps Natsu to use his power. Another might be 'Natsu's Captivity' which focuses on how his friends try to rescue him. There could also be a story like 'Kidnapped: Natsu's Ordeal' that delves into Natsu's own struggle while being held captive.