Greetings. In this intro, I plan to explain how Ulquiorras powers will work in this story. As he for the moment is a human, he will not have access to his Zanpaktou, nor any powers above the most basic Hollow ones. As a human, he will be able to use the basic Cero (though not Bala, Gran Rey Cero or Cero Oscuras), Hierro (Steel Skin), which will make him basically immune to physical attacks and spells, but spells such as the Cruciatus (which targets the nerves) and the Killer Curse (which cuts a persons Chain of Fate) will be able to hurt him or kill him. He will also be able to regenerate some injuries, but it will take longer and cost more power than if he was in spirit form.

He will also be able to use Sonido, the Hollows high speed technique. He will still have his magic, though it will be more in lines with the Shinigamis Kidou techniques (Hadou, the Way of Destruction, Bakudou, the Way of Binding and Kaidou, the Way of Healing), than the wizards wand spells.

Other than that, the more he uses his spirit powers, the more Ulquiorras and Harry Potters personalities will merge with each others, creating his true personality.

So, enjoy.

Standing on an stormy shore, on the northern coast of the British Isle, three men look out over the North Sea towards the wizarding prison of Azkaban. The first was Albus Dumbledore, Headmaster of Hogwarts School for Witchcraft and Wizardry, Chief Warlock of the Wizengamot and Supreme Mugwump of the International Confederation of Wizards. With him was Sirius Black and Remus Lupin, the Godfather and Honorary Uncle to the young boy he had been forced to send to Azkaban two years prior. Both of them had not been able to support Harry at his disastrous trial, Sirius due to being wanted for a crime he didn't commit, and Remus due to the bigoted ways of the Ministry, as he was a werewolf, and thus didn't count as a human being in their eyes.

For at least the thousand time these past two years, Remus Lupin cursed the anti-werewolf laws created by the bigoted Ministry. Due to them, he hadn't been able to help his friend James cub. Instead he had had to learn of the fate of his cub from the Daily Prophet the day after the trial, when he visited Sirius.

Sirius, on the other hand, was both angry and in despair. Since he had been wanted at the time, he had been forced to hide in the Black ancestral home, 12 Grimmauld Place, while his pup had been betrayed and sent to Azkaban. Oh, he had thrown out everyone who had betrayed Harry from his home, once he had learned of his fate. While Dumbledore had asked for the Order of the Phoenix to use Grimmauld Place as their headquarter, he had denied him, and only four persons were now allowed entrance to his home, namely Remus, Nymphadora Tonks (his cousin, and as she saw it, older sister to Harry) and the Weasley Twins, Fred and George, who had split from their family in support of Harry.

During the next year and a half, Sirius had spent most of his time in the Black Library, studying, and trying to find any way to free his Godson. It wasn't until six month ago, when Peter Pettigrew had been caught by the Aurors, he had truly been able to work towards Harrys freedom. It hadn't taken long after Pettigrews capture, for Amelia Bones to grant Sirius a trial, which, of course, led to him being exonerated and being able to take up the mantle of Head of House Black. For the next six month, he spent a majority of the Black fortune on a campaign against those who had sentenced his Godson to Azkaban. Once he had proven that those in charge of the trial was either followers of Voldemort, or corrupt and taking bribes from said people, he was able to get Harrys sentence over-turned.

This is why these three men now stands on a cold shore, waiting for the boat which will take them to Azkaban, where they will release the Hope of the wizarding world.

A few weeks had passed since he had awoken, and Ulquiorra had learned a few things. Firstly, the human guards in this prison was not very intelligent, as they had yet to figure out that he had changed. Secondly, these Dementors... Apparently, they are the result of the early stages of Aizens research into the Hougyoku and hollowfication. He had learned from Ichimaru Gin that the subjects of the experiments had turned to spirit particles and disappeared.

But it seems like that wasn't the case. No, instead, the subjects had turned into half-hollow abominations, neither living nor dead, and trapped in the world of the Living, feeding on souls, unable to return to Hueco Mundo or the Soul Society, their pain manifesting as an chilling aura of despair, which pulled the worst memories from the sub-conscious of those affected by the aura, to the front of said persons mind.

And lastly, it seemed like there was some sort of ward on the island that inhibited the use of spirit powers, as he could not manifest his powers outside of his own body. This caused some troubles, as he could use his powers to leave, and thus, was stuck there in his cell. As he sat there, pondering on this dilemma, he felt three presences arrive on the island. It took some time, but as they entered the prison, he recognized the. Albus Dumbledore, Sirius Black and Remus Lupin. Dumbledore had been at his trial, and while he hadn't said a word against him, he hadn't said something to help him either. Sirius and Remus, on the other hand, they hadn't been at the trial, but both had good reasons not to. Sirius was a wanted man, and Remus was looked down upon by the Ministry.

Now, Ulquiorra knew that holding a grudge was illogical, and thus didn't bother with it, but still, he couldn't see himself listen to Dumbledore ever again for what he did, or rather, didn't, do at the trial. So, as he waited for the guards to bring the three men to his cell, he sat down in a corner and pondered on what the reason for their visit could be.

Walking through Azkaban was not an experience anyone would call pleasant, but for Sirius Black, it was even worse, as he kept having flashbacks to the years he had been imprisoned there. As they followed the Assistant Warden towards the cell Harry had been placed in, both Sirius and Remus dreaded what they might find. They both knew that Harry didn't have the kind of defence from Dementors as Sirius had in his animagus form. Dumbledores thoughts though, were only centred 'round his hope of Harry being sane enough to kill Voldemort. At last, the Warden led them down the last corridor, before unlocking and opening the door to Harrys cell.

As soon as the cell-door opened, Sirius stepped inside and called: "Harry!"

Looking around the cell, they first didn't see anyone, but then a figure stepped out of the darkness in one of the corners, and spoke with an emotionless voice.

"I see you have finally reached my cell. I have followed your path since you all set foot on this island almost an hour ago, and I have wondered; Why have you come here?" Green, cat-like eyes stared at the three men from a cold face. "After pondering this question for a while, I have come up with two possible answers. One, you are here to take me to my execution, or two, you are here to release me. Based on your reactions, I would say that number two is the most likely scenario."

Sirius and Remus just stared at the person in front of them. "Harry..?" Sirius began. "Merlins left nut, what has happened to you pup?!"

Tilting his head slightly to the side, the green-eyed man answers, his passive face showing just a sliver of emotions. "Sirius? I'm afraid the child you know as Harry Potter is no more."

This answer brings out the rage inside both Sirius and Remus. "No more... Who are you, and what have you done to Harry?!" Remus demands.

The man shifts his eyes and looks at the werewolf:

"Remus Lupin... While this body belonged to Harry Potter, and I have all his memories, I am not him. I am the one who had his soul before it became his. I... am Ulquiorra Cifer."

At the stunned silence that follows, Ulquiorra once again looks at Sirius. "I know all that has happened to Harry. And I know that amongst all those he knew, you and Remus are amongst the few that had a legitimate reason for not being at the trial, or who didn't betray him. Now, I have one question; How long has it been since then, Sirius?"

Sirius and Remus was still to stunned to answer, so Dumbledore cleared his throat in order to make 'Harry' look at him.

"It's been almost two years, my boy." His eyes twinkling. "Thanks to Sirius, we were able to over-turn you conviction and we have come to free you, since we need you to stop Tom."

Ulquiorra scowled a bit at this. "So, you only came here to have me kill the so-called 'Dark Lord', and no other reason?"

Dumbledore took on his grandfatherly persona before answering. "My boy, there is a prophesy that states you are the only one who can defeat him, and..."

"Albus!" Remus interrupted him. "Now is not the time. We need to leave, so that Poppy can check up on Harry to make sure he is all right."

"Ah, yes, of course." With that, they left the cell, and waited for Ulquiorra to follow them. After a few moments, he did so.

"Very well, I shall follow you of this island. But, I will not kill Voldemort for you. No, I will kill him for her sake."

Sirius and Remus look at each other and said in tandem. "Her?"

"Yes. If you were to fail in defeating Voldemort, he would pose a threat to the rest of the world, and I can't allow that, since it would put her in danger."

"Who's 'her'?" Sirius asked.

Ulquiorra closed his eyes and sighed before answering. "She is the one, who holds my heart."

And with that he left, slowly walking towards the exit, Sirius, Remus and Dumbledore trying to catch up with him. The trip from the island was... strange, to say the least. As it still was light outside, all three of the wizards could see the changes in 'Harry'. His skin was much paler, and his pupils was slit as a cats. His temper had also changed, from an emotional, almost brash temper, to a cold, logical one. As the trip would take almost an hour, so Sirius, Remus and Dumbledore took the time to study the new 'Harry'.

Ulquiorra, on the other hand, ignored the three wizards, and stared emotionless out over the sea. Once they reached the main land, they stepped out of the boat. Suddenly, the three wizards drew their wands. "Albus, anti-apparition and anti-portkey wards just went up, it would seem we have company." Sirius said.

From the woods, a group of people in black robes with skull-shaped masks appeared. They were being led by a platinum blond man, who had a look on his face which made him look as if he was smelling something foul all the time.

Remus growled. "Malfoy..."

The blond man sneered at them. "Well well, the beast, the dog and the senile old man. And the so-called 'Boy-Who-Lived'. My Lord will be pleased when I return with you all."

As both groups of wizards prepared for the fight, Ulquiorra took a few steps forward.

"Followers of Voldemort," he began. "You are a threat, and thus, must be eliminated. Feel the despair of your own mortality."

"Foolish boy" Malfoy sneered. "The Dark Lord is the most powerful being in the world. You, and the rest of the Mudblood-lovers have stand no chance against Him. And as soon as you are dead, the rest of those pathetic muggles will follow!"

"So ka... Sonogo, kiemasu...*"

The Death Eaters laughed, and Lucius Malfoy lifted his wand in order to strike Ulquiorra down for his defiance. That was when Ulquiorra disappeared with a static sound, only to re-appear in front of Malfoy, his arm set to strike. With a single motion, he pierced Malfoys chest with his arm, killing him instantly. The rest of the Death Eaters froze, and after pulling his arm from the corpse of Malfoy, Ulquiorra pointed at the group, a green light gathering at his fingertip. Before anyone could react, a massive beam of green light swallowed the group of Death Eaters, leaving nothing but ashes in its wake.

Dumbledore, Sirius and Remus could only stare in disbelief at the slaughter that had just taken place, before Ulquiorras voice shook them awake.

"Sirius Black, do you still live in your families old home?" Sirius nodded in response. "Then, I will await you there."

Before anyone could say anything, Ulquiorra disappeared with a static noise.

"Well, crap..." was the eloquent statement that came from Sirius Black.

*Translations

Japanese: So ka... Sonogo, kiemasu...

English: I see... Then, disappear...