I probably should have said this first but I've blended Erza Scarlet and Erza Knightwalker into one if you hadn't figured it out already. The outfit Knightwalker wears is Erza's main battle uniform and the one that Scarlet usually wears is Erza's every day clothes. Also Makarov has his usual Titan Magic here but in battle he takes on the form of King Faust.
Erza got out of the bath and quickly dried off and pulled on her robe before walking out into the hallway, her still wet hair dripping water onto the polished floors as she walked. She stopped and turned around when she heard a commotion coming from the throne room.
"What's going on?" she asked, stepping into the throne room and seeming to forget that she was wearing nothing but a robe. The soldiers from all the magical warfare units, especially the ones from the one she commanded, looked at her before looking away with a blush tinting their cheeks.
Everyone, including the captain of the first magical warfare unit Panther Lily, the captain of the third magical warfare unit Hughes and his twin sister Mary, the captain of the fourth magic warfare unit Sugarboy and King Makarov in his battle form were sitting around a rectangular table, a large map open up in the middle which they were whispering over.
"Erza, good, you're here," King Makarov sighs. "Change into your uniform. We need the warfare units to go out to battle."
Erza nodded. Instantly her form begun to glow gold, Re-quipping into her captain's uniform: a revealing, halter-type armour breastplate top, light-armored gauntlets and greaves on her forearms and forelegs, a dark bikini bottom with a piece of cloth obscuring her hips and a dark scarf around her neck with a sword sheathed under the cloth. Erza walked around the table and sat beside Pantherlily, who happened to be a giant cat, an Exceed to be exact.
"What is going on?" Erza asked, looking at the map. The map was a map of Fairy Tail Kingdom with lines drawn around it, marking a battle plan. Erza traced a finger over the line that went from the castle's gates towards the ocean that led to ...
"We're having a battle with Alvarez Empire," Makarov explained. "We got a message from our spy in the Alvarez Empire that Emperor Spriggan is sending his strongest team, the Flying Dragon Squad, here, although he did not say exactly why they are coming."
"Who are the Flying Dragon Squad your Highness?" Sugarboy asked.
"I believe they are a group of Dragon Slayers: Acnologia, Sting, Rogue, Wendy, Gajeel and their leader Natsu. The spy also said that the leader is Emperor Spriggan's little brother."
"Does that mean that he is the Demon Prince?" Erza asked, her eyes widening. King Makarov nodded.
"Sugarboy, go fetch Prince Gray," he ordered. Sugarboy nodded and quickly ran out of the room in search of the Prince.
"Your Highness, why did you ask Sugarboy to fetch the prince?" Pantherlily asked, highly confused on why the King would call his youngest son.
"Gray is an Ice Devil Slayer and the Demon Prince is a fire demon. If anyone can defeat the Demon Prince, it's Gray." King Makarov scratched his chin, thinking. "Erza, I'll like you to access him. With your Flame Empress Armor his attacks would be halfed by fifty percent."
"I understand Father," Erza says, bowing her head as she stood up. "Second Warfare Unit soldiers, come with me."
The soldiers in Erza's unit all stood up hesitantly, following Erza out of the throne room.
Even though she was heading to battle Erza couldn't get the recurring dream out of her head.
"Why the hell can Acnologia turn into a dragon but I can't?" Gajeel mumbled. "I'm a Dragon Slayer too."
"Because I'm awesome," Acnologia states bluntly. Acnologia flaps his wings and suddenly dips, almost causing the five Dragon Slayers on his back to fall off. Acnologia was laughing to himself all the way.
"Acnologia-San, why did you do that?" Wendy asked.
"Because I wanted to," Acnologia answers back bluntly. Wendy sighed but didn't say anything. "Hey Little Girl, can I ask you something? I'm going to anyway. Why are you here? You're practically thirteen. Aren't you too young to be doing these things?"
"Says the guy who destroyed kingdoms out of pure boredom," Natsu muttered. Acnologia obviously heard him but choose to ignore him. Natsu climbed up Acnologia's back until he was at his head and the whispered into his ear - or at least where he thought Acnologia's ear was -"if you pull that stunt again I'll go all E.N.D. on you and then give you to my brother to punished."
Acnologia flinched, almost kicking the Dragon Slayers off again. The two things that Acnologia feared in the world - the only things that Acnologia feared to be exact - was Natsu's Etherious form because it was scary as hell and Zeref's punishments because they were worse than death. Acnologia remembered the time that he had disobeyed Zeref's orders because he was too tired to do anything. Zeref had punished him so severely that Acnologia had had to get consoling for two months.
"Hey Acknowledger," Natsu suddenly says, looking over Acnologia's head and pointing. "There's Fairy Tail Kingdom!"
"My name is Acnologia you little brat," Acnologia growled. "And how the hell do you know that? I can barely see anything but mountains and grass!"
Natsu didn't want to tell Acnologia because he recognised the fields below them from a recurring dream he had. It was of these very fields but they had been burning under natural and demon fire. And each time he had this dream there was always a red haired woman crying to him before accepting becoming a demon like him. Being a demon created from ether Natsu could turn a human into a demon by biting them, if they survive his bite that is. A lot of humans couldn't survive a bite from E.N.D., the most powerful demon from the Books of Zeref.
"I just know," Natsu says instead. He slugs Acnologia on the top of his head, causing his head to duck down and a groan of pain to come out of his mouth. "Now go down!"
"Ouch, you didn't have to hit me on the head you beat," Acnologia complained but did what he was told. Ever since he disobeyed Zeref and got punished Acnologia took to obey every single one of Zeref's orders, and one of Zeref's orders was to obey Natsu's orders, which he hated doing the most.
Acnologia landed on the ground, hard, and the five other Dragon Slayers jumped off his back and Acnologia transformed back into his human form, stretching his back.
"Shit, spending a long time in dragon form really makes my back ache," he complains, cracking his back.
"I'll make everything else on you hurt," Natsu says, grinning at Acnologia with his sharp canine teeth on display. Acnologia flinched at Natsu's honest words.
"Natsu!" a high pitched voice called. Natsu looked up just in time to see a small blue thing crash into his face, other little things crashing into the faces of the other Dragon Slayers (except Gajeel).
"Happy! I thought I told you to stay at Alvarez," Natsu says, hugging his Exceed buddy. The other Exceeds Carla, Wendy's Exceed, Lector, Sting's Exceed, Frosch, Rogue's Exceed and Ailas, Acnologia's Exceed, all disconnected themselves from their Dragon Slayers and sat on top of their heads. Gajeel, who was watching them all, did not look happy.
"Where's my kitty cat?" he grumbled. "I'm a Dragon Slayer too."
"You all know the plan?" Natsu asked the other Dragon Slayers, who all nodded. "Alright, let's go!"
The Dragon Slayers all turned towards where they thought the palace was but they were instantly attacked by a shard of ice heading for them, almost hitting them too if Natsu hadn't used his demon flames to melt the ice.
"That was a close one," Acnologia says with a whistle.
Out of the shadows of the trees two people step into the clearing. One was a boy with raven hair, dark blue eyes and was ... half naked, wearing no shirt and exposing a blue Fairy Tail symbol on his left pectoral. He had black marking going up his right arm too. The other one was a scarlet haired woman that Natsu recognised instantly as the woman from his dreams, the one where he named her as 'Erza' even though what she was wearing is different to what she had been wearing in his dreams.
"Would you look here, the Fairies have arrived!" Gajeel pointed out the obvious, turning his hand into an iron saw. "I'm going to squish some Fairies!"
Gajeel jumped at the half-naked guy, raising his iron saw arm over his head and bought it down towards him. However before he could hit the half-naked guy the woman jumped in front of him, blocking Gajeel's saw arm with her sword and sending sparks everywhere when they clashed.
"Wow, no wonder they call you Warrior Princess Erza," the half-naked guy states.
"You go on ahead Gray, I can handle this," Erza says, pulling her sword away from Gajeel's saw hand.
"No, I'll take care of the tinman," Gray says, punching his hands together and creating a small Magic Circle. Erza sighed and allowed Gray and Gajeel to fight each other.
She walked over to the remaing Dragon Slayers, brandishing her sword.
"You're a group of Dragon Slayers, huh?" she asked. She pointed the sword at Natsu as she asked "why are you in the group? Aren't you a demon?"
"I'm a Dragon Slayer too you know," Natsu says. "The good thing about Alvarez is that we have pet dragons as well as pet exceeds, even though our dragons are more parents and our exceeds are our friend. OK, Gajeel is the only one who doesn't has an exceed and Acnologia is the only one who doesn't have a dragon (he is his dragon). Anyway, my dragon Igneel taught me his Fire Dragon Magic! So I'm not just a Fire Demon but a Fire Dragon Slayer too! Let me show you!"
Natsu took a deep breath, drawing the fire in his lungs up and his cheeks expanding. He cupped his hands in front of his mouth as if he was going to call to someone far away and shouted, "Fire Dragon: Roar!" A whirlwind of golden red flames errupted from his mouth, guided by Natsu's cupped hands to go towards Erza, who didn't seem to be concerned about the fire heading towards her.
"That was too easy!" Natsu shouted when his roar hit Erza dead on, completely engulfing her in flames. "She didn't even try to block it. Is this really what Fairy Tail Knights are like?"
"Never underestimate Fairy Tail," Erza's voice says from within the flames. Natsu stares in confusion as the flames around Erza cleared, revealing Erza to be completely unscathed. She had also changed her armour too. She was wearing a black, red and orange armour that resembled a dragon, her scarlet hair done up in two pigtails and holding a red sword in her hands.
"Oh damn," Acnologia breathed. "Is that the Fire Empress Armour? I've only seen that armor once and it belonged to Ember Scarlet, Queen of Fairy Tail Kimgdom. She gave the Flame Empress Armour to her daughter Princess Erza before she died."
"So that's Princess Erza Scarlet?" Sting asked, sounding surprised and impressed. "This is the almighty Titania? Erza Scarlet, the Warrior Princess?"
"It may seem so," Rogue says. "But is she as strong as the rumors make her out to be?"
"Fire Devil: Rage!" Natsu yelled, doing the exact same thing as his Fire Dragon Roar but instead a whirlwind of blue-black demon flames erupted from his mouth towards Erza, who blocked them with the red sword again. Natsu's mouth dropped in shock at the princess' strength.
"Woah," he breathed in fascination.
"Pfft, that's nothing that I can't handle!" Sting laughed. "White Dragon: Roar!"
A white beam shot from Sting's mouth as if he were a beam cannon towards Erza really fast. There was no way that she would be able to dodge that in time ...
"Re-quip: Flight Armour!"
... or not.
Erza changed into another armour that resembled that of a cheetah's fur and in a blink of an eye was gone from the spot she had been before. She sped towards Natsu, who was only able to dodge out the way before she could hit him. Natsu changed into his Etherious form and flapped his fire wings once before flying towards Erza, matching the speed of her Flight Armour. The Demon Prince and Warrior Princess crashed into each other at the speed of light, but Natsu being stronger physically than Erza's Flight Armour, caused them both to tumble backwards and out of sight.
