Phase 1: The Declaration
A pair of young souls wandered the grey plains of sand, where no wind blew and life was void. Trees of crystalline material scattered across the field of view, giving an omen of death. They passed many beings that would haunt the memories of lesser souls, and probably tear them limb from limb and devour them, as well. But they hid under a cloak of shadows, protected by one of their swords from the prying eyes of their enemies. They approached the ruined remains of Los Noches, the old fortress of the Traitor Sousuke Aizen. Here now resided a host of Arrancar, beings perverted by a force that was not right.
"Kira, remember to keep your Reiatsu suppressed, even hidden by Shinkirou no Nitsuki, with the amount you have, it will escape and we'll be detected." Shinn reminded his younger friend. Kira may be brainy, but he forgot just how powerful he was. "Shinn, I'm not a 2 year old, I can handle myself well enough." Shinn laughed. "This coming from the guy who nearly wet himself when he got a visit from the Captain Commander." Kira turned bright red and punched Shinn in the arm.
"Never remind me of that!" And after that, they shut up, as they entered Los Noches. The white walls confined them into a never ending hallway that intersected more never ending hallways, with a large room on occasion. The place, so vast it's beyond imagining, was hard to explore. Finding the enemy in it would be nearly impossible, especially if the changed locations inside of it on a regular basis.
Suddenly, they heard raised voices. "Damnit, Hades! If you were there when Lord Grimmjow and his fellow Arrancar were battling the Shinigami, why didn't you help!? You are a Coward who does not deserve the title of Arrancar! Go back to you cave in the Menos Forest!" They followed the voices into a small room without a door, just a little farther up the hallway. There, a female Arrancar, who was the one they heard, and half dozen others surrounded another of their kind. The female, who wore a tanktop shirt and a pair of cargo shorts in pure white, and who had a white necklace and matching bracelets, stared at the man with her violet eyes in rage. Her dark blue hair glimmered in the moonlight, giving off a radiant beauty to her more than pretty face, framed by white mask material. The man who was being stared at just silently smiled. He had dark green hair, all spiked upwards. Half of the top of his head was covered in a mask, which started just below the eye. There was a horn on the top, and his eyes were serpentine. He wore a white shirt with a hole in it to show his Hollow hole, and a white vest overtop, undone in the middle. His pants reminded Kira of human combat pants. He started speaking just then. "I did not reveal myself because I disliked them. I dislike you for the same reason: You were born by a Shinigami's creation!" The girl laughed. "We were not created by a Shinigami; we were created by Lord Grimmjow!"
"Lord Grimmjow created you, yes, but he used an item to do so that was made by a Shinigami. He himself was also made by one. I was born by my own will and power as one of our people, not by the aid of the enemy! I'm here to stop you from making the same mistake they made: Trusting Sousuke Aizen!" And with that, the man they named as Hades stormed out. After he was out of sight of the others, he stared at Kira and Shinn with a huge malice. "I know you are there, young Shinigami. Tell your people of this, tell them to stop this. I do not want to see more blood spilt on the sands of Hueco Mundo."
Kira shuddered as the man walked away. He was clearly suppressing his Reiatsu, but it still outclassed his. Shinn was struck dumb. Then, Hades walked away. The girl, when she knew that he was out of earshot, resumed her ranting. "Damn cowardly bastard! How could he sit back and watch our kind get slaughtered?" Just then, the last thing they expected happened. "Be quiet, Karas Trescant! He is our most honored friend, the only Self-made Arrancar left alive." They recognized the voice from the Tech Departments recordings, it was Grimmjow Jaggerjaques! "He can do what he wants, as we will be strong enough in a month to take on Soul Society. So hold your tongue with him, lest you want him to thin our ranks!"
"Yes, Lord Grimmjow." She said quietly. And then Grimmjow poked his head out of the doorway and looked directly at Kira and Shinn. "Hello, cloaked Shinigami. I'd start running if I were you." And then he let loose his full Reiatsu, hitting Shinn hard enough to make him release his cloak. "SHINIGAMI!" The woman said, and the group of Arrancar chased them. They ran for close to twenty minutes before there was enough distance between them. "We need to leave, Shinn. Hirogari Tsubasa, Ketatamashii Kaze!" His blade, which was half drawn, was consumed by a swirl of wind. When it subsided, a spear was in its place. He swung the spear three times, cutting the air in the form of a rough doorway. The fabrics of space and time melted away, revealing the courtyard in Seiretei where he was designated to place all of his Portals. "Shinn run through!" And the both of them jumped through the portal. After the passed through, Kira closed it.
....
After reporting to Captain-Commander Yamamoto, the two of them waited in their respective Division barracks. The announcement came after an hour, when their captains spoke to them. Captain Ukitake was a kind man, but his face today, usually smiling, was very grave. "The Council of 46 decided that we will wage war against Hueco Mundo. All of you must prepare for battle in two weeks. That is all. Desuka Kira, I would like to speak with you in private."
Back in the Captain's Quarters, Kira was worried. "What is it you want, Captain Ukitake?" The man smiled again. "I need you to go to Earth, Kira. Specifically, Karakura Town. You need to inform Kuchiki Rukia and Substitute Shinigami Kurosaki Ichigo of this declaration. I chose you, since you'd be the fastest. The Sekai Gates aren't working right now and it could be days before they are finished." Kira stood up and bowed. "As you command, Captain."
Phase 2: A New Soul Arrives
An hour after his orders were spoken, Kira was arriving in Karakura Town. He felt the air, letting it tell him where to find Rukia and Ichigo. It isn't a strange ability, just a huge synchronization with his Zanpak'to. Very few reach this level, yes, but any Shinigami can if they try hard enough. "So, Ichigo and Rukia are to the south, it seems a hollow has shown up." Kira started moving, jumping from rooftop to rooftop, and using shunpo when he couldn't reach normally. He soon arrived at the site, and saw that the hollow was a lot stronger than a normal one. Still, it was too weak for Ichigo, from what he was told. "Hail, Substitute Shinigami! Let me deal with this one!" He said. Ichigo looked up. "And who are you?"
"I'm a messenger sent by Captain Ukitake. I thought it would be gesture of good will if I helped you out." Kira jumped down from the building, and called. "Hirogari Tsubasa, Ketatamashii Kaze!" His half drawn sword disappeared in a swirl of wind, and was replaced by a spear. The spear pierced the hollow's mask, and then was swung upwards, through it. The hollow disappeared in a haze of black energy.
He then approached Ichigo and Rukia. "It's nice to finally meet you, Rukia-senpai. Same with you, Kurosaki-kun. I'm here under direct orders from Captain Ukitake. There has been a war declaration on Hueco Mundo." Ichigo swore loudly. "Why? What is in Hueco Mundo?" Kira jumped back a bit at the hostility of the attack. "Well, Grimmjow Jaggerjaques is building an army, and it's nearly large enough to take on Soul Society."
Ichigo grimaced and made an annoyed sound. "Grimmjow, why would you do this?" Rukia shook her head. "You should have killed him back in Hueco Mundo, Ichigo. Now you'll regret it." Ichigo stared her down for a bit, and then relented. "I know, I know, I got to help, don't I?"
"Damn straight you do, Ichigo." Kira smiled. "You two get along well, it's encouraging. You are probably lovers, no?" The two of them blushed from ear to ear, and stared him down with enough rage to stifle even his nerves. "Sorry for the comment. Now, if you'll follow me to..." Where he wanted them to follow him to was left unsaid, for they all felt the presence of an Arrancar.
Haste Quintacera, Hades' son, was on the hunt. He was sent to find and kill Kurosaki Ichigo, and he planned too. He was only a Soldado Espada, a low level grunt, but he could still fight on par with most Lieutenant Class or higher Shinigami. He felt three traces of Shinigami Reiatsu heading towards him, as well as a few humans, too. So, they are going to try and horde me, are they? They will feel the wrath of Centella Escorpion.
First to arrive was a girl wearing Tae-Kwon-Do apparel. She had spiky black hair, a tough look on her face, and a slight bust. Following her closely was a large Mexican man, with curly brown hair, and a Short, glasses wearing Japanese kid, holding some sort of pendant, and wearing almost pure white. Also with them was a young lady with long, green hair and a scar across her nose. It was easy to recognize the former Espada, Neliel Tu Oderschvank. They came without delay, meaning they believe in victory. They were sorely underestimating Haste.
As Kira approached the Arrancar with Ichigo and Rukia, they stopped in mid air. The Reiatsu that they felt was overwhelming, and it was coming from the Arrancar! It was like nothing Ichigo had ever felt. Kira could barely stand. "This... this is insane. How can anything have this much power?" Kira asked. Ichigo just shook his head and laughed. "Grimmjow has gotten stronger than Aizen by a fair margin, why wouldn't he be able to create stronger Arrancar?"
A few minutes later, they arrived at the spot where the Arrancar was, and saw carnage. Tatsuki, Chad, Ishida, and Neliel were on the ground, bleeding profusely and barely alive. The Arrancar was released, and looked like a cross between a scorpion and a human. "So, you are the fabled Kurosaki Ichigo, Carrot-head. Your friends here gave some great entertainment." Ichigo yelled loudly, rage filling him. "How dare you hurt my friends like that. Ban-Kai!"
The Black Reiatsu so prominent in the memories of everyone who knew Kurosaki Ichigo swirled around him, and he came out with a mock Shihakushou and a black katana in his hand, chain hanging from the end of the handgrip. "Tensa Zangetsu." Ichigo said. "Now, you will die. Getsuga Tenshou!" And the black Reiatsu he uses flew out of his blade and towards the Arrancar. All the target did was smile.
Phase 3: A scope of the Enemy
Haste did not move for the attack. He just stood there, and with a swipe of his claw, brushed aside the attack as if it were nothing. "This is the power of the man Lord Grimmjow fears? It's so weak. I'll show you what a real attack looks like!" A red ball forms on both of his claws and his tail, forming larger, and turning deep crimson. A Triple Cero, one for each of the Shinigami. They fired, twice as large as a normal Cero, and double the Reiatsu density.
Ichigo just did the usual, pulling on his mask and shooting the Cero with a Getsuga Tenshou, cutting it in half. Kira admired the power the mask gave him, and unlike most Shinigami, using Hollow power didn't bother him. Rukia used her zanpak'to to stop it, as well. Kira, not feeling like being shown up, used his zanpak'to, as well. "Kazetora!" He called, and his Reiatsu shot out of his spear in the direction he swung it, forming the shape of a tiger. It clawed its way through the Cero before dissipating.
"Damn bastard is looking down on us!" Kira yelled. Anger flooding him, his usually calm demeanor was lost, and he charged straight at the Arrancar, his spear at the ready. Then, all went black as he approached the enemy. His body felt tingly, then, his vision faded and his consciousness was lost. Kira woke later in the Kurosaki House, with Ichigo, Isshin, and Rukia standing over him, Kon smiling at them from the desk in Ichigo's room. "Pops, you are a Shinigami?" Ichigo said. Isshin's face looked grim and sad. "Yes, Ichigo, I am a Shinigami. I was part of the Zero Division, but I was exiled for a scandal I caused the King." This startled Kira, as the Zero Division was a legend amongst the Corps. The personal bodyguard for the King, selected from the elite amongst the Captains of the Gotei 13.
"You are Ichigo's old man, correct?" Kira asked. Isshin smiled. "The kid speaks. I can't believe you woke so fast after being hit by such a high level attack. You're strong, especially for how young you are, Desuka Kira." Kira jumped. "How do you know me?" Isshin smiled. "I knew your pops. I met him when he was fleeing Soul Society for some reason. He stayed with us for a few weeks; you should remember that, Ichigo. You always called him 'Old Man Tsubasa'."
"Oh yeah, Desuka Tsubasa, the old man who carried an axe. All he ever talked about was his 'boy back home'. He was a Shinigami? He didn't have a sword, only an axe." Kira laughed. "Ah, Tsuba-ojisan sure gets around. That was him. His zanpak'to doesn't seal as a sword, but as an axe. Thank you for caring for me guys, but we really need to report to Captain Ukitake. Since he gave you your badge, Ichigo, you are part of the 13th Division, technically."
Rukia and Ichigo looked at Kira roughly. "Hey, I'm just reporting what the Captain said to me. Don't shoot the messenger."