Demon Slayer
By: Tellemicus Sundance
Fairy Tail x Naruto
Background and History
Before the Dragons, Demons ruled Earthland and Edolas. They devastated Edolas, causing it to lose most of its magic. With the rise of the Dragons, the Demons were hunted to near-extinction. Only one Demon survived the initial purge, the strongest Demon of all time, commonly called the Juubi. It was just too powerful for the Dragons to kill outright, so they performed some extremely powerful but dangerous magic to capture the Juubi and divide its life force into nine separate, smaller entities. The theory was that if they divided its power, the nine smaller new Demons would be that much easier to kill.
What they didn't account for until it was too late was that the new Demons would develop their own consciousness and personalities. Before the Dragons could attack, the nine Bijuu fled, going into hiding to recover, grow, and learn. Though they searched long and hard, the Dragons never found or were able to battle any of the Bijuu for many long years until finally the hunt was called off. When they observed certain Dragons training humans their versions of magic over the following centuries, some of the Demons decided to copy them, giving rise to a select group of 'Demon Slayers'. Dragon Slayers were more common though, and thus better known.
Kurama, the Demon Fox and the strongest of the Bijuu, trained only 3 people: Uzumaki Mito (wife of the Wizard Saint, Senju Hashirama), Uzumaki Kushina (Mito's niece, also wife of a Wizard Saint), and Uzumaki Naruto after his parents' assassination. When Naruto's basic training was finished when he reached age 12, Kurama sent the boy out into the world to gain actual fighting experience before he'd train him in the more advanced techniques.
During his first three years of traveling, Naruto gets into numerous fights with many mages and acquires a large number of rivals (including but not limited to Uchiha Sasuke, Hyuuga Neji, and Inuzuka Kiba). Many people constantly mistake him for a being a Dragon Slayer, much to his great aggravation. Then, one day, he got into a fight with a powerful blonde lightning mage and got thoroughly trounced. When asked if he was a Dragon Slayer like 'Salamander' yet again, Naruto was finally fed up and demanded to know where he could 'meet' this Salamander. Laxus took him to Fairy Tail.
Naruto wasted no time challenging Natsu, determined to prove once and for all that a Demon Slayer was stronger than any Dragon Slayer. After a fierce battle, both were KO'd and the fight ended in a draw. Afterwards, Makarov talked Naruto into joining Fairy Tail (with some help from the beautiful Mirajane, whom he's instantly smitten with) so he could have easy access to a strong and willing sparring partner. When it was discovered that Naruto knew next to nothing about how to read, write, and basic mathematics, Mirajane took him aside to teach him (trying to one-up Erza after she taught Natsu).
Guilds and Ninja Villages
There are five primary 'Guild Alliances' (Konoha, Kiri, Kumo, Suna, Iwa) that are made up of numerous smaller guilds (ninja clans). The two strongest guilds of the strongest alliance were the Red Fans (Uchiha) and the Thousand Oaks (Senju). The Red Fans were borderline 'dark' since they were suspected to take forbidden jobs behind closed doors, but it could never be truly proven. Thousand Oaks extremists with a grudge against the Red Fans organized false evidence to have the Red Fans be disbanded and arrested. The Red Fans tried to fight back but were betrayed and massacred from within. There are only two known survivors of the Red Fans, Sasuke and Itachi.
Evil Objectives
Uchiha Obito wants to 'reassemble' the Juubi, absorb its power, and use it to resurrect his lost love. Obito is the phantom leader of the dark guild Red Moon, who official goal is world domination.
Sasuke wants vengeance, power, and respect/fear. He is initially driven by a potent desire to become as powerful as possible in order to find and kill Itachi for betraying their guild. Afterwards, when he learns that the Thousand Oaks were behind the entire massacre and its origins, he transfers his need for vengeance onto them, especially the leaders of the plot.
Danzo of the Thousand Oaks wants to form a massive coalition of guild alliances to overthrow and replace the 'outdated' Magic Council, with him as the new Magic King. He is the leader of the secret dark guild Oak Roots
Orochimaru, leader of the Snake Den dark guild, wants to gain immortality and rediscover the lost knowledge of the Ancients. He is especially fascinated by the Red Fans almost genetic brand of 'Reflect Magic' (Sharingan).
Naruto's Demon Magic
Energy Manipulation: Naruto can convert his raw magic into numerous varieties of energy. He can use it in a tangible form to perform certain ninjutsu like Kage Bunshin, Kawarimi, and his Demon Cloak silhouette, or as an explosive like Rasengan and Bijuudama (Demon version of the Dragon Breath attack), or as an adhesive (water-, wall-walking).