After the explanation about what exactly they were doing there, the mutants informed the Avengers about everything that happened in the Winter War and the powers Aizen had. Urahara Kisuke contacted Tony Stark and Reed Richards, talking to them about the scientific aspects of the Hyonkuko. Both men were amazed by the intelligence the sandy blond had and the process he was able to create to stop hollowification.

"Who said blonds were stupid was sooooooooooo mistaken" commented Iron man. While this happened, the shinigami split to widen the area of search for the Arrancars. One day Taisei was patrolling with the Avengers when he noticed some energy in the roof of a building. Something that was definitely not human was waiting for them there.

"That´s not my name…" said a monotone voice. Kieran was lying on his back, singing while he was falling asleep. He had the earphones in their place. Even when he wanted to sleep his echolocation was working, making it difficult, so he put that thing on and he slept. He sensed a reiatsu close and took them off, evading easily the blow.

"What are you doing here, Arrancar?! Spying on us for your master?!" yelled the shinigami. The stoic Arrancar didn´t answer, just sat down again in the top of the building.

"I have no master"

"Yeah, right, and neither you have Espada class reiatsu"

"The Espada class reiatsu is something I have since I was born" said the blue haired teen. "But Aizen is not my master, I´m not part of his army. I declined that proposition, even if my family members did not. I´m alone"

"Then you can be our ally or the first one to fall in the war" Taisei draw his sword to threaten the Arrancar, but this one didn´t seem to be scared or anything.

"Fall?"

"Yes, like all the others that did before in the Winter War"

"Before? Winter War?" Kieran used his powers to enter the mind of the young officer and noticed several somethings, names of fallen shinigami that could be useful. He remembered one of his techniques, one that hurt to use… it was perfect. "Interesting, the fallen could be my weapon now"

"What?"

"Thanks for everything" said the Arrancar left vanishing in dark smoke. Taisei was speechless, that wasn´t sonido. For his part, the blue haired Arrancar used his Garganta to access Hueco Mundo a saw his army of Hollows, from zombie Vasto Lorde to Gillian. A shinigami was seeing everything, aware that he was noticed since a long time ago. The only reason he was still alive was that the teen didn´t consider him a danger.

"What are you planning, Kieran?" asked Ashido once he stepped into the clearing. "You reunited quite an army, enough to take down Las Noches as a whole…"

"Hungry… I am hungry… I want blood!" screamed one of his slave Vasto Lorde but Kieran stopped him with a signal. "His blood smells fantastic…"

"I´m going to the Seireitei, to get more gun power" said Kieran. "If you want to follow me, I can drop you home… along with some of my men" Ashido made a face that said that he was about to draw his zanpakto. "Relax, I´m only testing their strength. I´m not going to kill them now… or ever if my suspicions are proven real."

"Then I will accept your offer" they walked through the Garganta. While they were they were traveling the shinigami decided to talk. "Your mother is very worried about you, you know? You should at least talk to him"

"Who are you for telling me that?" asked Kieran without showing an expression, but his reiatsu suffered a fluctuation reflected in the tunnel.

"Just… a friend"

"Friend?"

"Look, Kieran, it´s been a long time since I had a friend and maybe I dislike Hollows, but… I don´t dislike you. For an Arrancar you are a very human person" the boy turned around with his ever stoic expression and Ashido crossed his arms. "And before you say that, yes, you have the expressions of a rock, but, like your mother, you care about you family and are going to sacrifice everything for them"

"You know nothing about me"

"Oh, I know more about you than you think"

"You have only known me for a few months"

"They were enough and now I consider you my friend"

"Maybe after today you will reconsider that"

"Nothing that you do will change my opinion" said the stubborn shinigami. "Whatever you are going to do, it´s going to be a reason behind it"

"Let´s see that" the final of the tunnel was finally there and the Seireitei. It was a dark moonless night, perfect for his plan. He instructed his army to attack and walked towards a bunch of mounds in the earth. "Let´s wait"

"Wait for what?"

"The end of the fight…" after hearing the last hollows fall, the teen lifted his head. "It´s over. Look what I do with this" he took his nails to his wrist and sliced it. Blood immediately started running out. "Wake up, my army of the undead, and stay forever in the darkness with me… Sangre"

"What did…?" immediately some figures started to form in front of them. They were shinigami, the ones that fall in the past: Yammamoto, Tousen, Ichimaru, Unohana… more and more were added before the blood disappeared. "What did you do?"

"Sangre is a high speed regeneration technique that repairs my body, even my internal organs" answered Kieran. "But once out of my body it could be used like Mordida, another of my techniques, to create more slaves… with one simple difference"

"What difference?"

"Ahhhhhhh" moaned one of the survivors of the army, waiting for his masters orders.

"What is… happening?" asked the pale shinigami that wanted to kill Aizen. Gin took his hand to his throat and gagged, feeling it hurt. The other had a similar reaction. "Blood… I need blood… I am hungry… so hungry"

"See? The ones created with Mordida were alive before I sucked out all the blood from their bodies and the ones created, mindless living corpses called Ghouls" explained the Arrancar. "And the ones created with Sangre are more like me, but obey me. They are vampires and need to feed on the blood of the living"

"You… you are the culprit… return us the eternal rest!" demanded the old man, but Kieran didn´t even looked at them. He drawn his zanpankto, but was stopped by the Arrancar, who lifted a hand.

"Go through the Garganta and wait for me there" he ordered and the others retired. "Now I see the result of the War and… I don´t like it"

"Kieran, what is it?"

"You don´t want to know"

-In Las Noches-

"Lalalalalalalalalaaa!" sang Siegfried while jumping like a bunny in the halls. The little Arrancar stopped when he saw a group of people reunited in the backyard. He smiled and uncovered his ears. He could not be as good as his brother, but his audition was not bad. And that group of rebels… was exactly what he needed to find out what Kieran was so afraid of. He started bouncing around to the throne room to wait for the Arrancar to come and steal Aizen´s secret weapon… or the fake one he put in it´s place. Once they had it the tiny child got out of his hiding place and smiled to them. "You are being bad" he accused.

"Well, brat, we can be worse" said one. "And if you want to see mommy and daddy again, you will have to shut up and go away… "

"Wait, do you know how to create a Garganta?" asked the leader. Siegfried nodded innocently and the man smiled. "Then create one for us and we will let you leave."

"Why? It´s some kind of game?"

"Yes! A game we are playing with… Aizen-sama! We are going to go to the human world and hide, then he has to find us, but we can´t start the game without you helping, no?"

"No. Here!" he opened the portal and went behind them. He watched the Arrancar disperse, but he himself stayed atop of the tower, feeling their reiatsu. Suddenly they entered into battle with the shinigami and he quickly felt a reiatsu that was different of all the other. So powerful, so great… so dangerous. Siegfried´s eyes went wide when the reiatsu finally hit one of the rebels and made it disappear… or not. It was sucked away by something… the Hōgyoku! So that´s how he feed that damn thing! And when the Arrancars died… "No…"

Ichigo have been there to visit his son in the Xavier´s Academy when he found out some Arrancars were attacking the city. He did what his instincts told him and searched for more attackers after calling the Seireitei for reinforcements. Renji, Ikkaku and Yumichika arrived shortly, ready to slice whatever hollow they found in their path. Once the Arrancars were defeated, some of them tried to escape through the portal. The shinigami followed them only to find there a frozen kid Arrancar with a face contorted in terror. Ichigo didn´t know what to think about him, but his Espada class reiatsu made Ikkaku attack him. Siegfried could only lift his head before the zanpakto descended towards him… only to be stopped by Pantera.

"Grimmjow…" Ichigo recognized his old rival.

"Siegfried, are you okay?" he asked his son, but he didn´t answer. "What happened, are you alright? Siegfried, answer me!"

"Dad…" immediately the child´s brain went into function again and he realized where he was standing. His situation was very delicate and he couldn´t let anyone know that he knew Aizen´s little secret, the Lord himself less. "Daddy, I was so scared!" he screamed like a baby, making sure to shed some tears to make a better act. "They told me it was a game… but it wasn´t! And that mean man nearly killed me!"

"Is that so…" Grimmjow growled. Inwardly he was shaking his head. He knew his son and knew that even if he was four, Siegfried would have never frozen in the middle of a battle… unless something horrible had happened. And he knew exactly what, he will only left the interrogation for later. "Then I will have to slice him"

"Try, kitty cat" said Ikkaku.

"You should be more careful with your son, Grimmjow" Ichigo tried to avoid more fight. He respected the Espada and didn´t want to kill him if it could be avoided. "He could have gotten hurt"

"Buahhhhhhhh!" cried Siegfried, faking again. "I want my mommy!"

"Okay, we will have to leave this for later" Grimmjow jumped to the Garganta, followed by the other retiring Arrancar. Once they were back in Las Noches, the traitors executed and the child out of danger and his mother´s arms, his father finally got the time alone necessary to ask him what did he found.

"I don´t know what you are talking about, daddy" Siegfried tried to appear innocent, but deep inside he just wanted no one else to find out that was under the spell of Kyoka Suigetsu. His father caught the message and didn´t ask anymore. He smiled and started jumping. He just hoped his brother can catch it. In the woods Kieran listened to the little one´s falls. He quickly got into the castle, with his own illusions cobbering him, and reunited with Siegfried. "So you came"

"I had to" answered the older. "Do you know now?"

"Yes and it isn´t pretty" the younger brother looked around. "He is not seeing us, no?"

"No, I caught him in my own illusion too. Right now, you are painting the walls" answered the older one. "Back to the problem, I need help to take him down"

"I know"

"And you are going to be perfect" the stoic Arrancar put a hand in the little child´s head. "Your powers are made to do sabotage"

"Be careful of the bad luck" he smiled and the other left. Of course he can do a little sabotage work, it was nothing new to him…