For the Etherious side, you could include Tempester. His ability to manipulate weather could create some really cool battle scenes with Natsu. And from the Fairy Tail side, Laxus Dreyar would be a great addition. His lightning - based magic would add another layer of power to the story. Also, don't forget about Mirajane Strauss. Her ability to transform into a demon - like form could have some interesting interactions with the Etherious characters. Plus, she could offer some unique perspectives on Natsu's situation if he starts to show more Etherious traits.
One important character to consider is Erza Scarlet. She is strong and has a great sense of justice. In a crossover fanfiction, she could be the one to try and keep Natsu in check if his Etherious powers start to go out of control. Then there's Wendy Marvell. Her healing magic might be crucial in case Natsu or any of the characters get injured during battles with the Etherious. And of course, there's always the option to include some of the more well - known Etherious like E.N.D. itself, which could have a very interesting dynamic with Natsu.
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.
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.
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.
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.
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.
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.
Well, if it's a crossover with Ultraman, Ultraman could be a great addition. His super strength and light - based powers would contrast well with the Jetman's abilities. They could have a friendly rivalry at first but then team up to face a powerful kaiju that is threatening both their worlds.
Well, obviously Lucy from Fairy Tail would be a likely candidate. She already has a strong connection with Natsu in the original series. Then from the world of Bleach, Rukia could be an interesting addition. Her cool and collected nature would contrast with Natsu's hot - headedness, and her Soul Reaper powers would add an interesting dynamic to the harem. Also, from Attack on Titan, Mikasa could be in the harem. Her strong combat skills and protective nature towards Eren could translate into a similar protectiveness towards Natsu in the fanfiction.
One thing that might make it unique is the combination of different fictional universes. Naruto and Etherious come from very different settings, so the crossover itself is distinct. The character of Dragneel could add another layer of uniqueness if he has a special role or ability in the story.
In a crossover with 'The Last of Us', Joel and Ellie would be great additions. Joel's survival skills and Ellie's immunity could bring new dynamics to the State of Decay world. Also, from 'Left 4 Dead', the four survivors like Bill, Francis, Zoey, and Louis could be included. Their combat skills against zombies could be interesting when combined with the State of Decay gameplay.