Accelerator: the Last Esper

Disclaimer: I don't own any of the characters from A Certain Magical Index/A Certain Scientific Railgun or from Avatar: the last Airbender; these characters and their stories belong solely to the creators.

Chapter 1: Where am I?

Accelerator awoke with a gasp, immediately griping his chest as he heaved large breaths to calm himself down; his eyes confusedly darted around his surroundings, taking in the new environment. It was dark, but he could still tell that he was outside. He could feel soft blades of grass that spread out through his open fingers; the cold night air bit at his pale skin and blew on the grass, creating a ripple. He was sitting up now and his exasperated heaving had died down to shallow breaths. His eyes eventually peered up and rested on a large, white moon that gracefully levitated in the dark sky. Transparent, ghostly clouds slowly moved through the atmosphere, ridding on invisible air currents. Accelerator placed his palms on the soft ground and pushed himself up from the floor, continuing to stare at the moon as if it would disappear if he looked away. Finally, he tore his eyes away from the lunar circle and looked around more at his surroundings.

He saw organized patches of various flowers and vegetation that were neatly placed into the dirt. About 10 feet away from him or so, he noticed a short brick wall that spanned around the area that he stood in.

'A garden?' he murmured to himself, putting the pieces together.

He kneeled down and gently pulled off a petal from a nearby blue flower; inspecting the piece of the plant, Accelerator glared at it while he remained deep in thought.

'where am I?' he questioned, although he didn't expect anyone to answer.

As he was considering a few possibilities of where he was and why he was there, he heard the repetitive thumping of footsteps that gradually got louder. Lazily, he turned around to face the direction of the noises, not really sure what he was expecting; but he knew that whoever it was, probably knew where he had woken up. A group of men came from around the corner of the brick wall and all stopped once they spotted him. The group of men all wore the same uniform; Accelerator quickly deduced that they were possibly guards of some kind, but they didn't seem to have any weapons on them. Accelerator disregarded this however when he heard a voice coming from behind the wall – a woman's voice.

"What is it? What are you fool doing?" a girl yelled as she angrily emerged from around the brick wall. Like the guards, the girl stopped in her tracks after catching sight of Accelerator, a look of both surprise and anger adorned her face.

"Who the hell are you? What are you doing here?" the girl asked after she regained her composure.

Although her tone sounded calm, the question still came out as a demand; the girl's eyes narrowed when Accelerator remained silent, seemingly ignoring her attempt at interrogation.

"Do not test me, boy," she said in a dark tone, "I can kill you without lifting a finger."

Even though the statement was said with absolute seriousness, Accelerator couldn't help but stifle a chuckle; he glanced at the girl, looking at her overall appearance and features. She had straight, coal-black hair that fell on either side of her head, framing her pale face. Her thin eyebrows firmly rested on her almond-shaped eyes; Accelerator couldn't help but stare into her golden iris that seemed to look back and pierce his very own. She had on clothes that were very similar to the guards' but retained details that made it obvious she was in command. Gold, black, and red were the main color themes that decorated all of their uniforms; a small golden flame-like symbol was present on all of their clothing. The uniforms themselves were quite large and somewhat loose, however, even despite this Accelerator could tell that the girl in front of him had a nice body.

"You can kill me without lifting a finger?" he said, tilting his head slightly to the side, "and who, may I ask, are you?"

The vary question seemed to irritate the black-haired girl as she made a loud clicking noise with her tongue.

"tch. Who am I? How absurd. Don't you know the face of your princess?"

Accelerator's eyebrows lifted slightly in surprise.

"Excuse me?" he said with genuine curiosity, "'a princess'?"

"Indeed. Don't worry, I'll give you ample time to ask for my forgiveness, but only after you beg for your life," she said with an eager grin.

"what are your orders, Princess Azula?" one of the guards asked in an obedient tone.

"Burn him," she said as her grin turned to a full-fledged smile, "but don't kill him. I want to see the defiance leave his eyes as he looks up to his 'princess'."

That final word was said with mocking venom as the guards all crouched down into attack positions. Accelerator lowered his eyebrows in confusion before he suddenly witnessed large balls of fire being shot from the guards' palms; the fire struck him, and his body was quickly engulfed in flames.

The grinning girl waited a few seconds before she finally signaled for the guards to cease their onslaught, and she chuckled to herself as she stared into the bright orange and red flames.

Her excitement soon turned to confusion when she realized that the figure that stood in the fire wasn't moving; however, that wasn't what was strange to her. What was the most strange was that there weren't any screams, shouts of pain, or intense wailing – there was nothing. For a second, she thought that he was dead, and she proceeded to let out a sigh of boredom and turned around. Before she could take a step to leave the fiery event, she suddenly heard something that made her veins run cold.

"Azula?...What a 'nice' name," a voice hissed from behind her.

She quickly whirled around just in time to see the boy from before standing still with the flames continuing to engulf his body. Because the flames that surrounded him were so brilliant, all she could see was a blurred silhouette that confidently stood within the inferno; she couldn't see his face any more, but two piercing red orbs glared at her with an intensity that made her shiver.

"When you said that you could kill me without lifting a finger…is this what you meant? Well then, let's see what you'll do when your guards aren't here to help you."

His words all trickled out from his mouth like daggers, each one cutting deeper into Azula's mind more and more. Suddenly, there was a thunderous sound that rippled through the air, and Azula watched as the fire that once surrounded the boy was now blown off of his body into nothingness.

"Don't blink," Accelerator said as he zipped next to one of the guards.

Grabbing ahold of the terrified man's neck, the white-haired teen slammed his head into the brick wall without any hesitation. There was a sickening crack that was heard as thick blood coated the surface. Realizing that they were under attack, the rest of the guards launched a group strike hoping that it was enough to take the boy down. Without giving it too much thought, Accelerator kicked a small rock that laid on the ground in front of him and watched as it tore through two of the guards' flesh. The remaining men watched in horror as their fellow guardsmen fell lifelessly to the floor; taking advantage of their distracted screaming, Accelerator leapt next to the guards and lightly tapped both of their shoulders. There was a slight delay before the next two guards suddenly exploded in unison, causing chunks of flesh and bone to scatter everywhere. The final guard, after watching what happened to the others, quickly collapsed onto his knees and quietly whimpered to himself as tears began to form in his eyes.

"p..please….don't…..don't kill me," the man said with clasped hands.

"fine," Accelerator responded coldly before he lifted up his foot and slammed it directly into the man's face, causing him to fall onto his back, unconscious.

Azula stared wide-eyed at the carnage that was displayed within the last 15 seconds as she quietly scanned the blood-stained walls and grass. She didn't know what to do – should she attack? should she run? Her thoughts swirled around in her head until the boy in front of her said something.

"shit. I didn't mean to go THAT far," he said, although it was obvious that he was talking more to himself than to her.

He finally looked up, as if he suddenly remembered that Azula was still there.

"heh, now you can show me how powerful you are. I mean you did say that you could 'kill me without lifting a finger'," he said, slowly putting his hands into his pickets as he walked toward her.

He stopped once their faces were inches apart, "show me," he said with an eager grin.

Azula's pupils dilated as she quickly realized something. The boy's face – it was like staring into a mirror; that grin was something that she herself would use whenever she was excited. The thrill of destroying, the thrill of killing, the thrill of having strength – it was something that she knew well. He was just like her.

As if this very realization was enough to calm her down, the young princess took a long breath with closed eyes and looked back at Accelerator. This newfound confidence of hers surprised the white-haired teen to say the least, but he continued to stare down at her.

"What is your name?" she curiously asked.

The thin esper replied without even blinking, "Accelerator."

"Accelerator?" Azula hummed with a smile, "I see. Accelerator, why are you here?"

Upon realizing that she no longer seemed intimidated, his body become loose as he replied, "I don't know. I don't even know where 'here' is."

A small smile graced her lips as she gestured for him to follow her.

End of chapter 1

A/N: Hey guys, so this is a new story that I thought would be really interesting to write; having two of the most dangerous and sadistic characters from their respective universes meet was an idea that I thought was pretty cool. Obviously, I'm going to try to stay close to their original personalities, but don't get mad at me if they do something you don't like. Also, I expect every single person who reads this to comment, or Accelerator will show up at your doorstep. Bye!