Hello everyone, Alcanax speaking.

First of all, I'd like to warn you about one thing: it's my first fanfiction, and first crossover.

Secondly; It's a crossover Bleach/HP, to be able to fully understand everything, I highly recommend having read Bleach up to chapter 388, and HP up to the fourth book.

Of course, I do not own, in any way, Bleach and Harry Potter.

Thirdly; Last time I checked, I was still human, so I'm perfectly conscious that I'm not perfect. If mistakes are done, I beg your forgiveness, and your help to correct them as fast as possible.

And at last; R&R, and enjoy!

Prologue

Ichigo was losing his fight with Ulquiorra Schiffer, Quarta Espada, fourth strongest warrior in Aizen's army. At first, when Ichigo put his hollow mask, when he still was inside the dome of Las Noches, he thought he would have a chance, he even saw Ulquiorra zanpakuto, Murcielago, shatter under the edge of Tensa Zangetsu. And then, Resurreción. Even his strongest attack, a full powered Getsuga Tensho, hitting Ulquiorra straight in the face, didn't leave a mark. Ichigo's hollow mask broke under a cero, nearly killing him. And if the obvious difference in strength wasn't enough, his opponent, to clearly show how useless and pointless fighting was, the Quarta Espada released his Segunda Etapa. The two last things Ichigo knew was Inoue's and Ishida's reiatsu appearing on the roof and a pitch black cero piercing through his chest.

He got his power to protect his family.

He nearly turned into a hollow to get them back in order to save a friend.

He threw away his humanity to get strong enough to defeat a new threat.

But,

He became feared because of his power.

At the end he couldn't even protect anyone.

Mask fragments fell out of his face, travelling downwards right before his eyes. Ichigo was now standing. He had no idea how he got on his feet. He was pretty sure the hole in his chest would have been fatal, but he didn't feel pain, he didn't feel dead. Instead raw power ran in his vein. He didn't know where he was, or what happened, but it didn't matter. He felt like when he was fighting Abarai Renji for the first time: unbeatable.

A faint movement caught his eyes, and turning his head, he could do nothing else than gasp in horror at the scene before him. Ichigo didn't know which sight terrified him the most. Orihime was staring at him with wide teary eyes, trembling like a leaf. She took a little step back as he set his eyes on her, and tears began to flow freely on her cheeks. Behind her, leaned against some rumble; the quincy Ishida Uryuu. His left hand was missing and his right's was gripping tightly around a nodachy, as black as the night, whose blade was stabbed in his stomach. Anger and pain were clearly visible in his eyes as he was glaring at the sword's owner. And directly a the left, Ichigo noticed Ulquiorra, an entire arm, a horn, and a wing missing, barely standing on a slightly shaking right leg, his left leg looked more like a dry rotten branch than an actual limb. And now, his usually emotionless eyes showed only untold surprise.

Right before he used sonido, his face re-transformed, emotionless again, however in his eyes, Ichigo saw that he came to a decision. He landed right before Ishida and without a second thought tore away Tensa Zangetsu from the quincy's stomach. But before he could turn around, a strong hand grasped his only wrist. As the bones began to crack, Ulquiorra closed his eyes. One way or the other, for him, everything would take the last step.

As soon that the espada's intentions were clear, Ichigo launched himself forward in order to retrieve his weapon. Little did he care when long strands of bright orange hair got into his face as the wind was making them dance around his head. And when he began to speak, the tone of his voice; double layered not unlike his hollow self but lower pitched, was of no importance.

"I've sworn to protect everyone with this sword. GIVE IT BACK!"

Ichigo didn't wait for Ulquiorra's reaction before sending a powerful kick into his rib cage, feeling with some satisfaction several bones shatter like glass below his fist. His opponent landed several feet away, now missing his right forearm too.

"Soten kisshun, I reject!"

Ichigo turn around just in time to see two sparks, two fairies going past him. Inoue had fallen on her knees, and closed her eyes. She wasn't even trying not to cry anymore. Letting go of the espada's limb still in his hand, Ichigo gripped the hilt of Tenza Zangetsu. He suddenly realized, he felt guilt in his guts, and a stab in his heart, seeing his friend crying before him, because of him. But now, nothing can be changed, and she was now safe and free.

He turned his head and made himself ready to go. He couldn't bear the sight anymore. And then without a sound he was gone, leaving a half-dead espada, an unconscious and bleeding Quincy, and a crying, mentally broken human girl.

Ulquiorra Shiffer had witness many things during his life. He was born as a Hollow, unable to do anything but seeing and walking. He had become an arrancar, a natural arrancar, without the help of Aizen Sōsuke. And the shinigami offered him the rank of the fourth espada in his army. Always he had used his eyes, to see, to show. For him, what he didn't see, didn't exist, until now. He had fought the substitute shinigami, and annihilated his heart with his Cero Oscuras. Kurosaki should have died, but he got up, transformed in some sort of hollow and managed somehow to effortlessly defeat the espada. But the weirdest part began when this monster lost a horn. His mask crumbled, only leaving a small part on his right eyes and forehead, his right horn still present and sharp. He didn't loose his red tattoos but his skin got some of his previous colour back, and most importantly his mind seems have returned. If Ulquiorra didn't know better he could have sworn being in front of one of his brother, an arrancar. And then, he took his Zanpakuto just before leaving. A part of his hair became white and transformed into some clouds, few seconds later, the hollow hole was gone. And the fourth Espada sunk into blackness.

So, end of prologue!

As you probably already have guessed this story begin at the end of the fight Ichigo/Ulquiorra (Chapter 353 page 9), with of course an alternate ending in which our dear representative shinigami keeps a part of his hollow power.

What will be the reaction of the Gotei? What will be his reaction towards his hollow self and zangetsu?

Answers will come soon!