Summary: Rin dreams of blue flames every night. When the Vatican discovers her, Rin finds help from an unlikely source to escape fate and begins to turn the tides on the most ancient war of humans vs demons. Fem!Rin

Hi guys, this is my first fanfic! Please review to help me improve. I'll try to update as frequently as I can but as I'm in college I can't promise a regular update schedule.

I do not own Ao no Exorcist or any of the characters.

Blue flame surrounded Rin, but it was warm and didn't burn her. The aura it emitted was almost… friendly.

"My dear Rin, we have much to discuss."

"Who are you?" Rin could feel the nagging at the back of her head, like she should know who the flames represented.

"I am _" The voice replied, the name slipping out of Rin's memory as soon as she heard it. Why couldn't she retain a simple name? With a frustrated grunt she decided to try a different question.

"Why are you here? Why don't the flames hurt?"

"Why would I want to hurt you, my precious daughter? I'm here to teach and protect you."

Rin couldn't shake the conflicting emotions. Her instincts were telling her to trust the flames, that they would indeed protect her. But something unsettled her still, The same tip-of-the-tongue, nagging feeling told her to be careful of the lulling voice.

"Our time for now is over, but I will see you again soon. I promise I'll teach you all you need to know about Gehenna and demons."

Rin awoke with a start, the dream already fading but the conversation still lingering in her mind, She was talking with someone, who? She shook her head as the answer seemed to slip further away. Looking over at the other side of the room, Rin noticed that the immaculately kept side of the room was missing it's usual occupant. Alarm blasted away any last traces of the strange dream as the dark-haired girl realized she was late for class. Again.

Quickly throwing on her school uniform and hoisting her trusty sword onto her shoulder, Rin made her way through the abandoned dormitory and began to cross the school grounds on her way to the main buildings. Despite the urgency in her step, she enjoyed the sunshine on her skin and the chirping of the mid-morning birds. Rin hated having to sit through boring 'normal' classes, but that was the requirement she had to fulfil in order to attend the cram school that would allow her to become an exorcist. That was the only reason she wasn't dead or a fugitive.

Shaking off the sudden mood shift from her thoughts Rin snuck into class without the teacher noticing she was late. She settled into her seat at the back of class and prepared for another boring day of lectures.

"Hey Shiemi!"

"Oh, hi Rin" the petite blonde responded with a smile. Ever since Rin had helped her overcome the influence of a plant demon that had made her temporarily unable to walk, they had been best friends. Attending the cram school together, both girls dreamed of becoming stronger to protect the ones they love.

The girls sat down at their seats in the front of the class and waited for their teacher to come. It was strange, getting used to her twin brother being her teacher, but somehow it felt normal now. Bon arrived with Konekomaru and Shima in tow and not too long after Yukio entered the classroom and began to teach the lesson.

"Don't you ever act like you're my father again!" she screamed. A slap across the face snapped Rin out of her rampage.

"We have no time for petty arguments. Just do as you're told." Shiro told her firmly.

"Fine"

Just as she was about to turn around, Shiro fell to the ground, struggling to breathe.

"Hey old man, what's wrong?"

"Get away from me!" Shiro shouted, feeling Satan beginning to possess him. Maniacal laughter ushered out of his lips.

"Dad?" came the hesitant question.

"That's right! It's your dear old dad Satan, but you can call me papa if you'd like," more laughter followed. "Now, this body isn't going to last long so let's bring you to Gehenna where you belong." With that Satan ripped off his fingers, blood pooling at his feet and bubbling. The Gehenna gate began to form. Satan snatched Rin from where she was standing and threw her in.

"No! Old man!"

Satan just smiled.

Rin pulled herself out of her memories and tried to pay attention to the classroom she was in. Finding out that her twin brother knew about her being the daughter of Satan had hurt a lot at first, but things have settled down since then and Rin was used to seeing Yukio at the front of the class lecturing about anti-demon pharmaceuticals. Had someone told Rin a year ago this would be her life she would've laughed in their face.

"That's all for today. Class dismissed."

Rin collected her books and headed out of the classroom with a wave to the fellow exwires, her friends. It felt weird to admit she had friends after years of being bullied for protecting her younger twin.

Now in her bedroom, Rn decided to take a nap before she would work on homework. She was exhausted from having to sit still for so long. With a yawn she curled up in bed, snuggling up to her cat familiar, and drifted off to sleep.

Surrounded by blue flames again, Rin just looked around before shrugging.

"Tell me what the exorcists have been teaching you so far."

Rin still felt the need to be cautious of the flames but decided it would be good review to try to remember what was happening in the cram school.

"Umm, we're learning about types of demons and something about medicinal plants I think," she scratched the back of her neck with a sheepish grin.

"Well, let me teach you about the types of demons and you'll know more than those exorcists do."

The dreams continued on for some time like this, the information imparted to Rin through these dreams helping her with the exorcist cram classes.

Sitting on a throne made of glistening obsidian was an ageless dark haired man. A smile played across his lips as he thought of his daughter and her progress. She was a brilliant mind when she applied herself and Satan couldn't be more proud. He hated that she chose to side with the exorcists, the betrayal hurt he'd admit, but all would work out in the end. It pained him to know that his daughter would be in danger as soon as the exorcists found out about her heritage which is why he was trying to prepare her as much as he could now. When the time came, he'd be there for her. He'd show her who the true demons were.