First Night: Knowledge is Power

The war was over, the Earl had been defeated, the Noah had stopped fighting under claims of having been manipulated by the Earl. Most of the exorcists had died in the battle, the few who were still alive stayed with the Order so they could destroy the remaining akuma. There were a few exorcists that disappeared entirely after the battle, namely, exorcist Kanda Yuu, exorcist, Lavi, Junior Bookmen, and exorcist General Allen Walker. The order searched for them for three years, Lavi, Junior Bookmen was found to have taken over as the new Bookmen, Kanda Yuu was never found, thought reports suggest that he is still alive. General Walker was proclaimed dead, he being the one who fought the Earl no one was really surprised. The Vatican declared that if he were to be found he would be executed for heresy, on account of him being a Noah. There was quite the uproar and while they couldn't openly oppose that Vatican the many of the exorcists, scientists, and finders decided that if General Walker was ever spotted by any of them nothing was to be done about it. In their eyes General Walker had earned his retirement, they weren't about to bring him in so he could be executed.

Years passed. The Black Order was finally disbanded once and for all. The akuma were gone, and the Noah had disappeared. More and more time passed, something shifted. The akuma were back, but they weren't the same. These were different, they were strange creatures. Most were small, the Vatican renamed these as demons, Hobgoblins, Coal Tar, Shades, Ghouls, and Ghosts were the first to appear. Then they found out about Satan and the eight demon kings. The Vatican reformed that Black Order under the name Knights of the True Cross, and so the war began again.

With the war over Allen found himself wandering in Tokyo. It was the first time since the end of the war he had really been outside the Ark other than random ventures for food. Being Allen it wasn't long before he was completely lost, but seeing as he didn't have anywhere else to be it didn't really bother him. He was sitting on a swing in a random park when a blue haired teenager sat on the swing next to him. He was wearing a white dress shirt and tie, on his face and hands were bandages like he had been fighting. Allen nodded at the other who nodded back. The two sat in comfortable silence for quite some time.

"Were you in a fight?" Allen asked the blue haired teen.

"Huh?"

Allen gestured to the bandages on his hands and face, "You don't get cuts like that from falling on the stairs."

The blue haired teen smirked, "You know thats the excuse I used."

Allen smiled, "Thats the excuse everyone uses, and somehow no one ever believes you."

The teen grinned, "My name's Rin, whats yours?"

"Allen, its nice to meet you."

"Your not from Japan are you?"

Allen shook his head, "No I'm from England."

"What are you doing in Japan? Are you a Tourist?"

"No I'm not a tourist," Allen hesitated, "I guess I'm looking for something."

"What are you looking for? Maybe I could help?"

Allen shook his head, "Thats alright, thank you for the offer though."

They sat in silence for a moment, "Where's your family?" Rin asked.

Allen tilted his head to the side with a half smile, "Depends on your definition of family, if your talking about blood relatives I haven't a clue. I have a few 'family' members that are somewhere around but I haven't seen any of them in quite some time. What about yours?"

Rin shrugged, "My twin brother, the old man and I live in the monastery nearby. The old man's a priest." Just then someone who looked like Rin but with brown hair, and glasses ran up to them. "Yukio!"

"Rin! I thought I would find you here, your boss called." There was silence, "how could you blow it like that Rin! Dad and I aren't always going to be around! What happened!

Rin's face darkened, "I don't even know myself!"

Yukio shook his head, "Don't give me that crap!"

Rin stood, "There are some things you just can't understand!"

Yukio backed off and sighed, "Never mind. Let's get back to the monastery, everyone's worried."

Yukio started to walk away, and Rin looked back to see Allen walking away.

"Wait, Allen!" Rin called. Allen stopped walking but didn't turn back. "Do you have somewhere to stay? If you don't you can come to the monastery, the old man puts people up there all the time."

Allen looked up. The sky was dark and gloomy. 'It looks like rain. Maybe it wouldn't hurt to stay for one night.' Allen turned and smiled, "I would be happy to stay if its no trouble."

Rin grinned, "Of course it no trouble."

Yukio gave Rin a doubtful glance, but went along with it anyway. After Allen introduced himself to Yukio they walked to the monastery. Yukio walked behind Rin and Allen on their way to the monastery. Allen wore a long black trench coat with gold lining, on the left side was some sort of ornate cross. Allen wore his hood up covering most of his face. 'I don't like this guy, I feel like he's hiding something.'

Allen watched as a man and his daughter came up to Rin and thanked him for saving his daughter. "My daughter has always been clumsy, so she's rarely without cuts and bruises." The girl hung her head.

"She wasn't being clumsy there was something pulling her hair, and taking things from her." Rin shouted.

"What did he look like?" the man asked.

Rin looked down at a loss, "He was like someone I've never seen before, with a face kinda like a monkey."

Yukio and the priest seemed shocked, "Rin you saw this?"

The man grabbed his daughters hand and began storming away, "Thank you I'm going to find out whose been bullying my daughter."

The girl pulled her hand from her dad and stopped in front of him, "It's not a human from school! It's the evil fairies!"

The man sighed, "I'm sorry my daughter has suffered these delusions from a young age."

Rin started to protest when the priest cut him off, "It's about a thousand years too soon for you to start lecturing people Rin. Sir I must ask that you not reprimand your daughter, you mean the world to her." The priest knelt down to the girls level and pulled a clover out of his pocket, "this is a four clover leaf charm, it will protect you."

The girl thanked him and she and her father left.

"Rin!" The priest shouted, "don't think you got out of trouble! You are grounded for the foreseeable future! No sukiyaki for you!"

"Aww! No fair!"

Allen chuckled, the priest turned to look at him, "I'm sorry, I didn't see you there. I'm Shiro Fujimoto."

Allen smiled, "I'm Allen Walker, its nice to meet you."

Rin popped into the conversation, "I told Allen he could stay here since he doesn't have anywhere else to go."

Fujimoto gave Allen a sharp look, despite not know what he looked like, he couldn't be much older than Rin and Yukio, "Where are your parents?"

Allen gave an unconcerned shrug, "Don't know."

Fujimoto raised an eyebrow, "Then who's been taking care of you?"

Allen raised an eyebrow of his own, "No one's taken care of me since I was twelve."

The other eyebrow went up, "You're more than welcome to stay here for as long as you need."

Allen bowed slightly, "Thank you." Father Fujimoto ushered them all inside. Allen hesitated for a moment once they were inside and pushed his hood down. The others who were really starting to wonder what he looked like, were surprised to see white hair, and a tattoo. Father Fujimoto and Yukio exchanged a glance, at the top of his scar was a pentacle. A sign of the devil.

Rin spoke up first, "Why did you bleach your hair? And whats with the tattoo and the earring? Are you some kind of punk?"

Allen snorted. Wearing all black and an earring is strange, but a punk? really? "The hair is natural, and the 'tattoo' is a scar. As for the earring a good friend gave it too me."

"Cool!" Rin looked like a kid with sparkles in his eyes, "how'd you get the scar?"

The smile disappeared from Allen's face, his eye's became distant and sad. "That's a long story, and one I'd rather not share."

They stood in akaward silence.

"How old are you?" Yukio asked.

"Fifteen."

"Thats the same age as me and Yukio!" Rin exclaimed. "When's your birthday?"

"December 25th."

"Ah! Your like three days older than me and Yukio! Our birthday is on the 28th!"

Allen smiled at Rin's antics. Father Fujimoto noticed and turned to the boys, "Alright now, you have a long day tomorrow, and I'm sure you've tired out Allen with all your craziness." Allen chuckled, their antics had nothing on Komui's. Father Fujimoto watched Allen closely, the pentacle on his forehead was one of two things, It could be a sign of Satan, or it could be a curse. Since he said it was a scar a curse was the more likely option.

"What does the word 'demon' mean to you Allen?"

Allen stiffened and shut his eyes, "Demon huh? To me a demon is a killing machine created by sorrow and pain." Allen opened his eyes and smiled at Father Fujimoto, "does that answer your question?"

The priest nodded, it wasn't by any means the answer he had expected, but it seemed familiar, like he had read it somewhere. He lead Allen to his room and showed him inside, "I have one last question before I go. Do you believe in God?"

Allen laughed. "Can't say I do Father Fujimoto."

"Why is that?"

Allen shrugged, "If there is a God why does he let his apostles suffer so much?"

Shiro had no answer to that, he had seen to many of his fellow exorcists die to know. Allen bid Shiro goodnight. Shiro went to his personal library and began looking through some of the books. The way Allen had described demons seem familiar. It was late in the night when Shiro came across it in a one of his books.

'When a person dies their souls can be called back from the dead by a loved one. A man once known as the Millennium Earl is the person who creates the vessels for these souls. The vessel appears as a metal skeleton. The skeleton will inhabit the body of whoever called it back from the dead. It then becomes a killing machine in the hands of the Earl. As these machines kill they 'level up' the highest level akuma known is a level four. One exorcist described them as being, 'a killing machine created by sorrow and pain.'

The book went on to describe a substance known as Innocence, that cleansed the souls of the akuma. People who were able to use this substance were known as exorcists. It also described the Noah family, who were characterized by their grey skin, the stigma on their foreheads, and golden eyes.

'The organization the exorcists worked for was known as the Black Order. The Order was under the Vatican, and was disbanded twelve years after the defeat of the Millennium Earl.'

Shiro closed the book and looked at its cover. The author was Lavi, no last name was given. 'So now I know why it sounded familiar but how did Allen know about it? Is he an exorcist? But even if he is, this book has been passed through the line of paladins. He shouldn't know anything about it.'

The next morning Allen was gone without so much as a goodbye. Yukio also left early for school. When Rin woke up much later he walked out of the monastery and followed a few other boys to an alley where they wanted to speak to him. Two shadows followed him.

Rin watched wide eyed as Shiratori came towards him, "GET AWAY!" He yelled as blue flames burst from his body. Shiratori was blown back by the force of the explosion, and the two boys who had been holding Rin down ran off. He watched as his hands burned blue. 'It's burning but it doesn't hurt. Whats going on?!'

"My eye was unerring! These blue flames! Satan's offspring!" Shiratori advanced towards Rin and knelt down next to him, "Come with me to Gehenna my young prince we ave been waiting for you."

Father Fujimoto's voice came form the shadows behind the Rin, "Mischief is in their hearts, give them according to their deeds, and according to the wickedness of their endeavors. Give them after the work of theirs hands, render to them their desert. Thou shalt smite them and not rise build them up." He advanced towards Shiratori.

Shiratori hissed, "Curse those words exorcist! I shall seal your mouth so you cannot speak those cursed words!"

Calmly Shiro continued his chant as he dodged Shiratori's attacks. "Blessed be the Lord. You have heard my curse, the lord is my strength, and my shield, thou shalt perish!"

Allen watched from the shadows as the demon was torn out of Shiratori, but it was still tethered to the boy. "Are you alright?"

"Will Shiratori be alright?" Rin asked.

Shiro nodded, "The demon was torn out of him, he should be fine now. You can see them now." Shiro gestured to the bug like things that were floating around.

Rin nodded, "What are they?"

"They are demons known as Coal Tar they are attracted to dark places and evil humans."

"Wait I still don't understand what are demons!" Rin was all but shouting.

"There are two realms Assiah, and Gehenna. Both are mirrors of the other, Assiah is our world, and Gehenna is the demons realm. These two are separate, but demons have learned to posses the material here, and interact with our world. Stand up, this incident has revealed the truth about you. Demons of every kind will be after you for every sort of reason." Father Fujimoto pulled Rin to his feet.

"Wait why are they after me!? Just what am I!?"

"You are not a human Rin, you are the child of a demon born of a human."

"What about Yukio? Is he-"

"You are fraternal twins he didn't get the gene."

Rin lost all color in his face.

Shiro pulled Rin to his feet. "Come on it's almost dark, thats when the demons are most active."

They ran, jumping across roof tops. Allen followed them staying far enough behind them that they wouldn't notice. They stopped for an instant as they were surrounded by dog-like creatures, Shiro threw a bomb and raced through a door slamming it closed and slumping against it.

"I'm getting too old for babysitting."

Allen grew worried as they ran the rest of the way to the monastery. 'Something doesn't feel right.'

As soon as they entered the gates Shiro gave an impressive list of orders to the others in the church.

"Father Fujimoto!" Allen called.

Shiro's eyes widened when he saw the white haired youth, he was wearing an impressive white cape on the front of which was a silver and black mask. "Allen! What are you doing here I thought you left."

Allen shook his head, "I didn't, I've been following you and Rin for the better part of the day." Shiro was about to interrupt when Allen beat him to it, "I know about the demons what their after and Rin. I can't explain now but I'm on your side."

Shiro seemed to hesitate but then he nodded, "Follow me. Rin you too."

He led Allen and Rin down a staircase where he unlocked a chest and pulled out a sword he pressed it into Rin's hand, "This is the demon slaying sword Kurikara. Your demonic powers are sealed inside, keep it with you always, even when you sleep. Whatever you do don't unsheathe it, you powers with be released and you will never be human again." He gave Rin a phone, "This only has one number saved in it, he's a good friend. Call him as soon as you leave the monastery, he'll take you in. Allen go with him." Shiro turned to leave.

"Wait old man! Did everyone know about this? Why did you keep it a secret? What are you doing? you can't order me around! you aren't even my father!" Rin yelled, as soon as he said it he knew he shouldn't have. He did think of Shiro as his father but he didn't want him to protect him while he was being useless.

Shiro turned and slapped Rin. Shiro's face fell, "What have I done?" He let out a choked cry and blood poured out of his mouth, eyes, and nose. Allen started towards him, and Shiro waved him back, "Stay back." as Allen watched another soul entered Shiro's body. Allen fell to his knees covering his eye, it had been a long time since Allen saw a soul as twisted as this.

"Father?" Rin asked.

Shiro laughed maniacally in a voice that wasn't his, "Yes its me Satan your true Father! but you can call me papa!" He walked towards Rin and grabbed him dragging him to the center of the room.

"Give me back my Father!" Rin yelled.

He was ignored. "Gehenna Gate. Soon we'll be home my beloved son!" A grotesque Gate appeared from the ground bubbling like tar. Satan threw Rin into the gate.

Rin struggled and squirmed, "Someone! HELP ME!"

"Rin!" Allen yelled, part of his cloak reached out to grab Rin around the waist. It started to pull Rin out of the Gate when Shiro/Satan attacked Allen. The cloak immediately retracted as Allen brought up his left hand to block Shiro/Satan's attack but the sheer force knocked him back into the wall where he was knocked unconscious. Satan/Shiro walked to the edge of the gate where he began laughing maniacally, "Happy Birthday! My son!"

"He's..not your Son!" Shiro regained control of his body for a moment, he reached down to grab a pointed pendant, and stabbed it into his chest.

"He's my son." Shiro said.

"Filthy exorcist! taking your own life!" Shiro as he fell into the Gehenna Gate, "It's too late, the Gehenna Gate doesn't already has you in its grasp!"

Rin gripped the hilt of his sword, "I haven't shown you anything yet! don't die on me old man!" he pulled the blade free of its sheathe. His ears grew pointed, he grew a tail, his teeth grew sharper, and he was covered in blue flames. Rin drove the blade into the center of the Gate and it was consumed by blue flames. Finally the Gate was gone, the church was in ruins. Rin leaned on his now sheathed sword, "Dad." He cried. Shiro was dead.

Yukio came into what was the Monastery. He ran to Shiro checking his pulse. He hung his head when there wasn't one. He looked around the other priests seemed to be in good enough condition, as did Rin. Allen was another story, he was laying of the floor some ways away from the center of the room. Yukio ran to check his pulse and was relieved to find a strong one. Allen's left arm shot up to grab Yukio's wrist. Yukio was surprised at the strength of his grip, he was such a small boy that Yukio didn't expect him to have any muscle. Slowly Allen's eyes fluttered open, when he saw Yukio he let go of his wrist and slowly sat up.

"Are you hurt?" Yukio asked, Allen might be almost a stranger, but Yukio had had enough of dead people for one day. Allen was quiet. "Allen?"

Allen stood ignoring Yukio and talked to other two men, asking what needed to be done. For the rest of the day Allen moved all the rubble out of the chapel. Yukio tended to the others wounds, and then began preparations for Shiro's funeral that would be held the next day all the while ignore Rin.

The next day the funeral was held, Rin stayed in the cemetery for quite some time. Allen never left him alone even when it started to rain, he gave Rin space but he was always there.

"Allen?"

"Yeah?"

"How did you know everything?" Rin asked.

Allen stood next to Rin at the headstone, "I've known about demons for a long time. I haven't done much about it though. I learned about you from following Father Fujimoto. That's really all there is to it."

Rin glanced at the phone Father Fujimoto gave him and flipped it open and pressed the call button. As soon as he did a really weird guy in a white and pink suit appeared.

"Are you Rin Okumura?"

Rin nodded, and he suddenly noticed the men surrounding him and pointing guns at him. Allen took a fighting stance next to Rin. "Hey! Whats with the guns!"

"You are the son of Satan we are here to execute you."

"Who are you?"

"I am sir Mephisto Pheles, Principal at True Cross Academy."

"You're the old mans friend right? Are you an exorcist too?" Allen glanced at Rin a bit surprised at the direction this was taking.

"I suppose you could say that."

"Then teach me! I want to be an exorcist!"

Mephisto doubled over laughing, "This is to good to be true! the son of Satan! an exorcist!" Mephisto's expression changed quickly to one of interest, "I like it! lower your weapons!"

"But sir-" one protested.

"I will stand for the consequences, put them down." The man put away their weapons and walked away, once they were out of sight Allen relaxed a bit. "I guess we'll have to get you enrolled into my school."

"School?"

"Of course," Mephisto smirked, "True Cross Academy, there is a cram school that the exorcists attend after regular school." Allen shifted and Mephisto was startled to see him, "dear me I didn't see you there mister?"

"Allen Walker."

Mephisto's eyes widened, "The 14th? Now what are you doing with the son of Satan? I thought you and the Clan of Noah were strictly neutral in this war of ours."

Allen sighed, "I not taking sides, not yet anyway."

Mephisto smirked, "Then would you also like to attend school at True Cross Academy?"

"Sure, why not."

AN: Thank you for reading! Let me know what you think, I don't care if it's negitive or not. Also if you have any ideas of where this should go please let me know. Also if you find any errors let me know I don't have a beta and this is my first fanfiction so I want to know my mistakes.