This can be manifested through myriad sets of circumstances. It could be the breaking of a cipher, or a code of conduct, or of ethics, or an even deeper set of personal beliefs, or none of these things. Feel free to come up with your own.
She sat still holding her breath. Her quaking knees ached under pressure as she continued to squat behind the pure white pillar out of the guards view. Her hand moved to her hip to quitetly pull the gun from her waist band on the white lab pants. Preparing for confrontation, she cocked the gun back back. The loud clicked grabbed the guards attention, she let go and stood from her hiding spot to moved into his view. His eyes widened with fear and he swiftly reached for his weapon but she was quicker. Her finger squeezed the trigger as her vision turned red to fall into unconsciousness. She let her demon come out to take care of the man in her path to freedom as she falls back into her own mind, sheltering her last fragment of sanity.
She came back to consciousness in a new hallway wiping the blood from her hands onto her white pant. Sirens screeched through the building and red lights flashed as a warning that experiment 342 was free. Her heart pounding against her chest as she thought about the nearest exit. Time was dwindling every second she stood staring at her blood stained pants contemplating a plan of action.
"You need to let go of fear." The demon within her spoke. "Let go of all emotion."
She tried to ignore the voice in the back of her mind. She knew better then to listen to it but every day she relies on the mysterious being more and more, and it was the only one that spoke to her with kindness, though she was no fool, she knew its motivation all to well. It does not care for her safety, but its own safety in the fact that if she ceases to exist, it ceases as well. It was a parasite in the back of her mind struggling to manipulate her motivation but she kept the demon in it's place as they used each other for survival.
The blond nine-year-old girl shook off her thoughts and took off down the hall to find the exit. She turned a corner quickly and was met with a fist to the jaw. The punch knocked the little girl back a couple feet, losing composer as blood filled her small mouth. The opponent grabbed her throat to throw 342 up against the concrete wall. He held her down by the back of the neck to scan the bar code on her left shoulder blade. Blood dripped down her pale chin from the pressure of the wall against the wounded jaw.
"Did you really think you could get away Number 342? We wouldn't want you to get out into the real world and get hurt, now would we?"
The demon in the back of her head growled and attempted to take over the little girls form to fight the insolent soldier. Number 342 pushed the red mist of the demon back to keep control of herself. The soldier chuckled to himself while dragging her back to the cage unaware of the boiling rage building from within the small figure of the nine-year-old.
She was put back into a white room with the one way glass mirror. The guard left her to deal with her wounded jaw. She was familiar with the punishment that was soon to come so she left the wound to itself, not bothering to heal it if it will only open again.
"Why are you so kind towards them?" The demon asked her. She was unsure of the answer. Could it be possible that she is simply good natured? That she can't stand the sight of pain, whether it was her own or her opponents. Her kindness might come from her emotions and her ability to read her opponents.
To a normal human they might be able to take someone's life when forced to without feeling much guilt, but to her, one look into their eyes and she knows their fear, their pain, and their weakness. She found this ability sickening; the way she could memorize every expression down to the individual muscle as she kills them unwillingly. She despised everything she was, for what she has to do and hopes every day that it would be her last but the demon keeps her alive for it's own safety despite her will to throw everything away for one taste of freedom.
Freedom was almost hers. It was her addiction, her need. She craved for the outside world; wanting to see the sun and the sky. She had heard so many stories of the world outside her four walls, and the beauty it provided. She wanted that even if she had to die trying. She has never seen the world outside of the lab, not even as a child. She can never remember a time when she wasn't locked away in the lab. Her only memories were of these white walls, the doctor that tests her, her failed attempts of escaping, and the demon.
"They don't care about you. They didn't even give you a real name. You are just their experiment." It called from the back of her mind.
She placed her head against the wall. "Then what does that make you?" She asked back to the voice.
"Your friend. You're only companion and your only source for information. I know much more about what is going on here then you think and I am willing to share under one condition."
"What is it?"
"We combined into one energy, one soul to embody one body."
"No."
"342 didn't make it outside, I see." The doctor mumbled into the test data. "It is no where near strong enough for war yet. I am not sure if this experiment is even worth the time. 342 is behind 10% on the average growth rate and I don't see any progress." He let the file of data flop onto the table.
He met eye to eye with the division director. His coal black eyes studying the doctor for a second. "I think experiment 342 will be very useful. We can use it to improve later experiments by studying it's defects."
The doctor nodded to the demoralizing director. The man stood and walked over to the window to study 342 through the one way mirror. Her small form curled into a corner with a mournful look painted her face. His brows knitted together in thought. "Is this experiment built in with a conscious?"
The doctor flipped through 342's profile to see what they had done during her mental development period when she was still in the test tube. "Yes, the tests do show it has a built in conscious. Why do you ask, sir?"
"It has developed a split personality to cope with its environment." He chucked as he watched the little girl change facial expressions as the argument continued in her head.
"That would explain why it isn't developing properly, 342 isn't accepting the environment, but creating another personality to suit the environment so it doesn't have to cope." The doctor explained to the director.
"Interesting." He paused. "I want the split gone, this is usually taken care when they are first going into the academy, but I suppose relapse is possible. 342 is going to have to accept it's place in society, or die because of it."
"As you wish, sir."
"What are you so afraid of? What do you have to lose? Here we are, sitting in this same empty white room, same as yesterday. You are bleeding and in pain, same as yesterday. You are crying because you hate this god damn place and you want to leave, in yet, here I am offering you power and an escape but you won't take it! How do you expect to change your life if you aren't willing to change yourself? You can't, it is impossible. I am offering you the change you need to be free." The demon argued back aggressively.
"That power and freedom come at a price, you know that and I know that! I am not stupid."
"I think you have paid enough already... don't you?"
She paused to think about the offer, believing its argument is true, then this organization owes her. She deserves the freedom and the knowledge of her past. She deserves the life they never gave her but she has to work to get it.
"What is the price that you would put on freedom?" The demon calmed spoke to the little girl. "Was the first 3 years of your life living in a cage enough for your freedom? How about the next 2 years they spent putting your through torturous training for battle enough? What about when you were 7, right before your graduation? When you were forced to kill three of your other classmates to save your own life in order to pass the final exam? Is that enough for your freedom?" The girl could not answer, she did not know.
The demon continued, "If that isn't enough for your freedom then you will spend the rest of your life in this hell, they will use you till you are not of any use to them anymore. Then they will throw you aside like a used rag doll. I won't do that to you, I am your friend."
The conversation was interrupted by one of the doctors coming into the girl's white room. He did not speak a word to her, but grabbed her by the arm, dragging her out the door and into the hall. She struggled to keep up with the doctors long stride while sobbing out of fear. She knew where he was taking her, the lab, where they would punish her by testing new equipment on her, or reactions to new chemical compounds.
The two finally reached the door, but they passed it, walking forward to the white door at the very end of the hallway. Her heart dropped and her eyes widened at the new door. Digging her feet into the ground she tried to get free from the doctors grasp, she closed her eyes scared from what she might see. He dragged her with ease through the white door and into a darker light room. She was shackled down to the floor as she curled into a ball.
"Look at me." She was commanded. She ignored him. "LOOK AT ME!" He screamed while taking a chunk of hair into his fist, forcing her to look at him. " You will do as you are told."
He let go of her hair and stood up to discuss what they should do with the other people in the room. He turned his attention back to the little girl, "Who is the other thing inside of you?"
She looked up to him from her position. "You...mean.. the demon?"
"I suppose so, it needs to go."
"Tell him to kiss our ass." The demon spoke to the girl. She shook her head at the demon.
The doctor looked at the girl with a disgusted expression. "Why are you shaking your head at me? Do you not want it to go?"
She choked out a sob and answered, "No! I want it to leave. I don't want it!"
"Then fuse with me! I will no longer exist because I will be you, and you will be me!" The demon yelled at the girl.
"Then get rid of it!" The doctor ordered the little girl.
"But sir, you don't know what you are asking for! Please, please don't make me..." She begged the doctor. He raised his hand to backhand her for disobeying.
"Do it. Now." He spoke through clinched to teeth.
"You heard the dead man!"
Her vision started to blur. The red mist climbed into her mind from the depths of her subconscious. She felt an unimaginable rage pulse through her as she grinds her teeth to cope with the pain, unable to suppress the demon any longer, she belted out a scream that woke everyone in the organization. Her vision turned red from the demon taking over her, it chuckled at her as she struggled to gain back control.
"Don't worry my little conscious." It murmured to the fading 9-year-old. "You will still exist as that little voice in the back of my head."
"You promised me power and freedom!" She screamed back at him, enraged at his lie.
"But darling, you do have power now, because I am now you. Freedom is soon to come."
"I am not you! I refuse to be any part of you. You are a part of me, a small, weak part of me with a big voice. Your power comes from me and I am taking it back."
The demon chuckled at her attempt to come back strong. He shut her out and pushed her deeper into the back of his mind but she continued her struggle against him.
The doctor watched the little girl fall to the ground landing on her side. Her blank eyes staring at the wall behind him. He bent down to feel for a pulse on her neck. She still had one, but her eyes registered no movement or sign of brain activity. Taking a small flash light out of his lab pocket he moved the light over her eyes, nothing.
He grew concerned for his job, if she died surely the director would put blame on him. Rechecking the pulse, he noticed movement from her eyes, she blinked. Relief filled his mind but was quickly taken away as the little girl took hold on his neck. Looking back into her eyes he no longer saw the fear he once inflicted on the small child, but rage, pure rage that stuck terror deep into his suffocating form. It was the last thing he saw as the room around him faded into darkness.
"Miss, is that all you will needin' today?" The shop owner asked a small girl. She smiled at him while handing him money.
"No, I think I am fine for the next couple miles." She placed her supplies into her leather bag. He looked her over concerned.
"You travelin' with family?"
"No, it is just me." She continued to organize her pack.
"How is a little girl like you survivin' out there all by herself?"
She closed her leather bag and looked up at the store owner beaming. "No need to worry about me sir, I am a demon slayer."
He shot her a puzzled look. "What do you mean? Like an exorcist or something?"
"Something like that, you have to live through it to understand it."
"What could you have lived through already? You are what, eight?"
She knew he wouldn't completely understand the organization she had escaped or how their power effects the war raging in the west.
"Lets just say I have destroyed my own demon."
"Hm. Well, have a good travel. Stay away from the west, I heard the war is getting bad out there."
She walked towards the door and took one last look at the man and smiles, "No promises."