The Blue Exorcist; Book 1

An Ao No Exorcist & Fairy Tail Cross-over Fan-made Fiction Story

By My Book of Demons

Disclaimer: I, My Books of Demons, do not own Ao No Exorcist nor Fairy Tail. This story is for entertainment only and fan-made for fan purposes only. I make no profit from this, and never will. Any references towards the two anime/manga subjects go to their owners, none by me.

Author's Note: This is my first attempt at a Cross-over and of these two mixed together no less. I'll try my best not to disappoint, but knowing human beings there will be disappointment. Only time will tell that that disappointment will be overruled by epic-awesomeness of these two shows combined into one.

Chapter One, First Born of Satan

Since the beginning of time when the human race dawned upon the world, they never believed one of their own could love a demon. They never believed the Demon Lord could ever love or be loved, and yet it was possible. A human women by the name of Yuri Egin fell in love with Satan, and he gave his heart to her. Together they united, and their love impregnated Yuri with sons, twins no less.

However, man found this an abomination and whence discovering this they wanted Yuri dead, knowing her sons wouldn't be human but rather half-demon, and of Satan no less. They believed this as something that shouldn't exist, and so they sent exorcist the order to kill Yuri Egin, but Satan had foreseen this and hid her away in the forest they had first met.

As time passed and Yuri Egin grew closer to giving birth, Satan went on a rampage of panic in order to find someone who he could possess without any ill effects to save the women he loved, who was going to be executed by the Vatican for being impregnated by him. During this time, he murdered a huge number of the world's greatest holy men, gaining the name of the event "Blue Night".

Enraged by this even, Yuri's father, Ernest Frederik Egin ordered Shiro Fujimoto and Mephisto Pheles to find and kill his daughter and Satan's children. They found Yuri within the forest with her newborn twins, whom she named Rin and Yukio, and soon died of childbirth. Their orders were known and the chance to kill the sons of Satan was there, however instead of killing the twins, Shiro decided to seal Rin's demonic powers within the Demon-slaying blade Kurikara with the help of Mephisto, but by doing this is sliced his heart in half, leaving the human heart absent of the demon half. Mephisto predicted in time, Rin would awaken his demon side with Kurikara, and that it would be best if he were raised in a world were he wouldn't be hunted and hated by humans that knew he would be the son of Satan.

Shiro saw this as well, and decided they would send Rin and the blade Kurikara with him to another world using the time space gate that connected the two worlds of Gehenna and Assiah. Shiro learned that Yukio had some dormant power of Satan inside himself as well, and knowing that the only way Yukio would ever be able to protect his brother if he ever returned would be to be pure human, and so during the ritual of sealing Rin's powers into the blade Kurikara, he had also placed all of Satan's power that was in Yukio into his older twin, Rin that night.

Shiro decided to raise Yukio as his own child and Mephisto made a deal with Fujimoto that if Rin returned and if his Demon powers ever came out, he would be under his custody.

That night, the newborn twins were separated with Yukio in the arms of Shiro Fujimoto and Rin and Kurikara in the arms of Mephisto Pheles who would deliver him to another world away from Gehenna and Assiah, so neither side could reach him if they wanted.

As many knew, Assiah and Gehenna were mirror worlds, just as all worlds were connected by their mirror. In their universe, Assiah was the material world in which humans live. Demons can pass into this world by possessing anything that exists within it. It is the ultimate goal of Satan, the ruler of Gehenna, to make Assiah his own. To prevent this from happening, specially-trained human in the world of Assiah can exorcise Demons back to Gehenna through various methods. Any kind of contact between the worlds is normally impossible, save for Demons who live in Assiah by possession objects.

Gehenna was the world in which Demons live, and Satan is the god of Demons and the ruler of Gehenna. There was no material present in Gehenna and the only direct way to Gehenna is through the Gehenna Gate which only Satan can open.

Mephisto decided it would be best if Rin were thrown into the furthest universe away from their own, with little to no connection to the mirroring world. However, he could not place Rin there himself, and had to release Rin into the space in between Assiah and Gehenna, to what was known as the Daedrelm. No one has crossed into Daedreim before knowing there was no returning and possible death if one did not fall into a universe, and was left as a floating corpse forever between worlds. Not only that, but one would literally have to be an infant to go through, for after a year of being in one world their soul is bonded and cannot be severed to leave to another world. This was to keep balance between the universes, and because of such it was very rare for a being to pass through the Daedreim whether demon or human.

There was a very slim chance Rin would make it to Mephisto's planned destination, however as long as Mephisto had good aim and Rin wasn't hit by some floating corps, he should arrive in the world. What made it so difficult was the long journey to the world, and at such a young age it would be a miracle to survive traveling such long distances. Yet, it was already a miracle itself that Satan, the god of demons had fallen in love with a human and had sons. It was a miracle they weren't killed, and it is a miracle that this was all possible.

So, Mephisto without a doubt, tossed the infant Rin into the Daedreim watching as the bundle of blue cloth disappeared into the distant leaving behind a grinning son of Satan behind.


The sky was dark as the storm rained down on the lands below. It was nearly night, and the town was mostly absent of people who were either inside away from the rain staying warm, or were in a rush to get there.

In the middle of a street a small bundle of blue cloth sat alone and the infant inside wailed as the cold rain splashed against his soft skin. Thunder sounded in the distance followed by cackling white and blue lightning that put the infant's, Rin's, wails silent.

Loud footsteps sounded from the distance, bare feet splashing cold water to the sides as a person ran towards the now silent child.

When the person reached Rin, they couldn't be identified male or female for the dark brown rags that completely covered their body, along with a hood that shadowed their face. The stranger quickly picked Rin's infant form into their arms and shushed them, before picking up in a run towards a large building in the distance.

The building lights were out and everyone inside was silent despite the raging storm outside. However, when a hurried knock was sound on their front door, a women in a light blue robe, with just a candle giving her light in the darkness hurried towards the door, before swinging it open revealing a brown cloaked person, holding Rin in the wet bundle or blue cloth in their arms hugged to their chest.

"Please, take him. I found him on the street abandoned and he'll die outside in this storm." The person, voice identifying them as a women said hurriedly, offering Rin to the women hoping they would take him and keep him safe from the outside.

The women in the light blue gown quickly took Rin into her arms, keeping him dry from the rain outside. "Wait!" The women yelled, seeing the cloaked women begin to walk away. The women turned and looked at her, waiting. "You said you found him, so he's not yours?"

The cloaked women shook her head as a negative, for she had no idea who this child was.

"Does he have a name?" The women inside asked.

The cloaked women was silent for a moment, before finally saying, "No, but I felt something inside the blue cloth so check if there's anything inside that indicates the child's name." She responded, before running off into the night and disappearing into the distance.

The women in the nightgown looked up at the storm raining down above before quickly shutting the door and rushing towards the central room, gently laying Rin on the table before lighting a lamp before hurrying back to the infant.

Slowly she gently moved away the blue cloth revealing the pale-skinned infant boy, who had a small bit of black hair on his head, and was sleeping soundly. The women sighed, and wrapped the baby in a grey warm blanket before grabbing the blue cloth only to hear something clank loudly on the ground. Furrowing her brows above her confused brown eyes she looked down, and saw a sheathed sword on the ground causing her eyes to widen in surprise.

She knelt down, and picked up the beautiful sword and moved her hands to open it, before hesitating and pulling her hands away from opening it. Getting to her feet, she laid the sword next to the sleeping infant before smoothing out the dark blue cloth searching to see if there was anything else hidden inside it, and found one other thing. A thin white slip of paper that had a named sprawled on it, it said RIN.

"Rin, then. Well, welcome to St. Joseph's Orphanage, Rin." The women told him, before her eyes found the blade Kurikara. "I see great things ahead for you, little one."


Three Years Later

"Take. It. Back!" Rin yelled, his small but bloody fist smashing into the ribs of Kaleb, the older boy called him a demon, and Rin was enraged by the remark. Kaleb was three years older than Rin, seven to be exact, and was now broken and bleeding on the floor as the other children of the orphanage watched, their cries never reaching the ears of the furious messy, navy-blue haired boy.

Hurried footsteps were heard nearing, and all the children that had been watching Rin beat the boy up fled from the room, leaving the Head mistress to it. "Rin!" The mistress shouted, appearing in front of the child, and sternly looking him in his blue eyes. "Let him go, this instant!" She demanded.

Rin looked angrily at her. "He called me a demon... a-a monster!" He shouted, bringing another fist down on the boy's face.

"Doing this, isn't helping the situation. You're only making it worse on you, Rin. Let. Him. Go." She told him firmly, causing Rin to clenched his teeth before throwing Kaleb away from him.

"To your room, Rin. I'll speak to you there in a bit." She told him, turning away from him to go to the bloody and beaten boy. Rin angrily rushed away, down the corridor, glaring at some group of huddled children whispering to each other about him, before finally reaching his room and slamming the door open to his room before closing it equally as loud as opening it.

An hour later there was addition to his room, a large hole next to the window which was where the boy was now. His head laying down on the cool rim of the window and eyes looking out on the street, eyes numbed with sadness.

He heard the door to his room open softly before closing, and a soft hand touch his shoulder. He brushed the hand from his shoulder, eyes hardening and disappearing any trace of sadness before turning around to face the women in front of him who looked down at him with soft sad eyes. "Rin..." She started softly, and Rin brushed passed her before sitting at the edge of his bed.

"He called me a demon, everyone calls me one but I'm not!" Rin started as a whisper but slowly turned into a shout. "You're right, you aren't a demon, Rin." The mistress told him, sitting down on the wooden chair across from him.

"Then why does everyone hate me! Ever since the beginning! What did I do to deserve this!" Rin yelled, hands becoming fists in anger. The mistress in front of him sighed. "It's not what caused it, it's what you do that effects the situation afterwards." She told him, making his cold blue eyes look up at her in anger.

"Am I supposed to let him just say it to my face then and not do anything!" Rin shouted, punching the wall to the left of him.

"Yes, you're just fueling them for their next attack on you. You know better than this, Rin." The mistress told him, sternly but gently. Rin didn't say anything, just stared at the ground in anger.

Rin looked up when he felt a hand mess with his hair. "You know better, Rin. Be better than them, and ignore their insults because no matter what they say you are not a demon. You are sweet, Rin, don't let their words ever change that about you." She told him, gently.

Rin's eyes then filled with tears, and he looked back at the ground. "I'm sorry." He whispered, holding his tears back.

A hand lifted his chin up softly, his eyes meeting the loving, calm eyes of the head of the orphanage.

"I know, Rin. You don't have to apologize to Kaleb, I'll have a talk with him as well. Just, promise me you'll try to stop causing these fights in the future. Don't let others change you for the worse, you're a great person already, Rin. Don't let them take that from you, because that let's them win." She told hi, before removing her hand from his chin and pulling away.

"I promise, miss Jones." He said, as he watched her go. Once she had gone, Rin let his tears fall before burying his head in his pillow as he sobbed quietly in his room.

Rin felt abandoned by everyone, at least everyone but miss Jones, and because of that he promised he would try.

And it was a promise he didn't plan on breaking.


Well, that's it for this chapter. I'm trying to keep Rin in character, but there will be some experiences he'll go through that will change him, but not enough to change his entire self, I can't explain it very well.

By the way, I was watching some Tokyo Ghoul amvs while writing this and I was wondering if the anime was any good.

Well, thanks for reading and try and give this story a chance in the future.

Sincerely,

-My Book of Demons