A/N: I've been messing around with this and making some revisions, so far I have only put the two parts of the prologues together, but there will probably be more (aka I have writers block on this story). I don't really know why I separated the prologues in the first place.

Disclaimer: I don't own TMNT, just my OC.

Prologue

She exited the abandoned building that she was currently staying in. The sun was beginning to set below the horizon, making a black silhouette of the New York skyline. Climbing up to the roof, the girl stretched for a minute, then began running, jumping over the gaps in the buildings. As the moments passed, the sky steadily grew darker. She loved the dark, and the unwavering calmness that came with it, even in this city. She had only been here a few weeks, but was already in love with the constant activity that New York was known for.

The girl stopped to scan her surroundings, taking in the layout of the city around her. That's when she heard the telltale grunts and thuds of a fight somewhere off to her left. She quickly turned and sprinted toward the direction the sounds were coming from. She stopped when she found the origin of the noise. Three figures, clearly skilled ninja masters, were fighting at least fifty ninjas that were wearing all black from head to toe. Although the black ninjas were less skilled, they were rapidly overwhelming the three…giant turtles?

She shook her head in an effort to expel the shock that had momentarily taken over her. She was in no position to judge the creatures that obviously needed help. Whipping her double katana out of their sheaths, the girl jumped to the roof of the next building where the fight was taking place. She took out five before landing, and another ten in the next few seconds after.

Raphael saw the flash of two silver blades out of the corner of his eye. 'Leo?' was the first thought that came to the turtles mind. He tried to catch a glimpse of the newcomer, but the foot ninjas he and his brothers were fighting were blocking the way. The hothead began to work his way through the crowd until he could finally see who it was.

Raphael's eyes widened in shock when he saw who the swords belonged to. Her midnight black hair went down to her waist and contrasted sharply with her pale skin. She had a thick green headband in her hair that matched her spaghetti-strap tank and sneakers. Also, she wore black capris that cut off just below her knees. The girl's movements were quick, graceful, and precise, never missing a target.

The ninja girl looked at the turtle, smiled and nodded reassuringly at him. Suddenly, her grin disappeared and her amber eyes widened.

"Hey, look out," she yelled over to him.

He couldn't move; he tried, but his limbs just wouldn't obey the commands his brain was sending them.

Seeing that the turtle ninja wasn't going to react to the threat that was coming at him, the teenage girl jumped between the creature and his attacker. She managed to deflect the other ninja's sword with her own. Eventually, she knocked him out, but not before he sliced into her side creating a deep flesh wound. The girl growled in pain, the sound forcing Raph out of his shocked state. The red masked turtle quickly got back into the fight.

"Pay more attention next time," the raven haired girl snapped at the turtle.

Raphael rolled his eyes, "Whateva."

The roof top battle went on for another fifteen minutes. Only six foot ninjas were left standing. Five of them ran off, escaping to fight another day. The turtles considered going after them but decided it was pointless.

The girl was still fighting the sixth, standing on the ledge of the eight story building. Just as the turtles were about to run to her aid, she kicked the last ninja in the chest forcing him to the ground. She stuck her katana through the loose fabric of his black shirt, pinning him down.

"I recommend you leave my friends over there alone from now on," the skinny girl practically snarled at the ninja.

"And if I don't?" hints of panic and anger were evident in the male voice.

She leaned closer to him until her face was only inches from his. "Do you really want to find out?" her voice as calm and cold as the arctic. She then stood up, pulling out her katana. "Get out of here," she commanded the unskilled ninja.

He quickly got to his feet and ran in the direction the others had.

The girl walked over to the three turtles, sheathed her swords, and stuck out her hand. "Hi, my name's Esmeralda," she informed them brightly.

Taking that as his queue, the orange masked turtle replied, "Hey dudette, I'm Michelangelo, and these are my bros, Donatello and Raphael."

Donatello furrowed his brows and motioned to the cut on her side, "Your hurt."

"Huh…oh, it's nothing, I'm fine." She responded quickly, putting her hand on the wound in an effort to stop the blood flow.

"Would you please allow us to help you after you helped us out, it's the least we could do," Donatello said.

Esmeralda nodded her consent, so the purple masked turtle kneeled beside her to examine the deep gash in her left side. "This is going to need a lot of stitches, you've also lost quite a bit of blood," the brainiac told her, "you could come with us and I'll get you fixed up, or we could drop you off at a hospital."

Panic flashed through her eyes that only Raph seemed to notice, causing him to raise a brow in suspicion. "I'll go with you," she replied quickly.

Donatello was about to pick her up when she held up her hand and took a step back. "I can walk."

The medic crossed his arms. "You're in no shape to walk," he stated.

Before Esmeralda could argue, Raphael picked her up bridal style and started towards the lair.

"Put me down!" the girl growled as she struggled to get out of the hothead's grasp.

"I ain't listenin' ta you an' Don argue all night," Raph snapped. "Now quit strugglin'."

"I would if you put me down," Esmeralda quipped.

"Heh…nice try, girly, dat ain't gonna happen, now shut up," he answered, his Brooklyn accent thick in his voice.

By now the four were in the sewers, quickly nearing the entrance of the lair. Raphael brought the injured girl to the infirmary, while Don pulled out his medical supplies.

"Do you want anything for the pain?" he asked Esmeralda.

"No, I'm fine…barley feel it." Her voice was calm and steady.

Donatello was impressed by this girl; even his oldest brother Leonardo, who was infamous for trying to hide pain from his brothers, would have flinched when the process of stitching began, but this girl didn't flinch at all. Actually, when he was almost done, Don noticed that she had fallen asleep.

"I've always told you that you were boring, this kinda proves it." Don turned around to see Mikey standing just inside the door way of the infirmary. "Wha'd ya do? Explain quadratic mechanics to her or something?" the goofball teased.

"It's quantum mechanics, Mikey." The brainiac rolled his eyes, "And, no, I didn't say anything to her."

At that moment Master Splinter and Raphael entered the room.

"How is she, Donatello?" the aging rat inquired.

"She's going to be just fine, Sensei. But she needs rest; it looks like she's hardly slept in weeks."

Splinter nodded his head then looked over to Raphael, who was looking down at the sleeping girl. "Is something the matter, my son?"

The sai bearing turtle looked at his father then back to the girl. "Somethins' not right wit' dis girl, she panicked when Don said dat we'd bring her to a hospital."

"Maybe she's Nosocomephobic," Don suggested.

Michelangelo gave his immediate older brother a confused look, "Ahhh…dude in English please."

"It means she has a pathological fear of hospitals. Like Raph's pathological fear of bugs."

"I ain't scarred a no bugs," Raph growled through his teeth.

Splinter ignored his sons' banter, and stared intently at the girl. Most humans would have run away at the sight of giant turtles, not willingly go home with them. Perhaps she was afraid of hospitals, as his smartest son had suggested, or maybe it was something else entirely. Either way, he would talk with her when she woke-up; the ninjitsu master was very interested in where she had come from.

"It is late my sons, time for you all to go rest," he ordered his students.

The turtles silently nodded and left the infirmary to retire to their rooms for the night. Splinter glanced back at the girl one more time before doing the same.

The next morning, Esmeralda woke-up to find the cut in her side hurting her a lot more than it had the night before. Ignoring the pain, she sat up and looked around the room, taking notice of the clock hanging on the wall. It was five o'clock in the morning. She let herself fall back, her head hitting the pillow as she lay back down.

"Ugh…why can't I just sleep in late for once?" With a frustrated sigh, she stood up and walked out of the room. She ventured around the subterranean home, walking through the living room, the kitchen, past the bathroom and what she guessed was a meditation room. There were stairs leading up to the second floor, but she decided not to go up, figuring it was were the bedrooms were located and she didn't want to disturb anyone. Eventually, she came to the dojo. Upon entering, she saw one wall lined with different weight lifting equipment, along with a punching bag in the far corner. On the opposite wall was several shelves that held various weapons, gadgets, and pieces of armor. In the middle, a large mat was laid out on the floor. Sitting on one of the shelves nearest her were her katana. Quickly rushing over to her prized possessions, she picked them up and pulled one out of its sheath. Her eyes slowly swept over the weapon, taking in the green cloth wrapped around the hilt, and the silvery glint of light reflecting of the cool metal.

The turtles that Esmeralda had met last night and a giant rat entered the dojo. She quickly re-sheathed her katana and faced the four creatures.

"I did not mean to wander, I was just looking for my katana," she apologized, lifting the swords for them to see.

"No need for an apology, child, you are welcome here." Splinter assured her, "Though, I would like to talk with you."

Esmeralda nodded, "What about?"

The wise rat sat on the floor motioning for her to do the same. "It is my understanding that you know ninjitsu. I would like to know where you acquired your skill."

The teenage girl sat down in front of Splinter. "Do you want the full story or the summary?"

Raphael leaned against the wall and crossed his arms. "Whicheva's fasta," he snorted.

Esmeralda looked over at him with defiance in her amber eyes. "My parents and I moved to Japan when I was three. Our next door neighbor was a master in the arts of ninjitsu and bushido. He started to train me. When I was eight, my parents d-died in a car crash, so my sensei took me in." Esmeralda paused, looking at the floor. "…Then, about a month ago my sensei passed on, also. Be-before he died, he told me had a friend in New York that could continue my training."

"Who is it that you are looking for?" Splinter inquired.

"Um…someone named Hamato Splinter,"

The old rat bowed his head, "I am Hamato Splinter,"

"Well," Esmeralda pulled a small envelope out of the pocket of her capris, "then, I guess this is for you."

Taking the envelope from her, Splinter opened and read the letter inside. When he was finished, he looked back to the now anxious girl. "I will continue your training, but what does Makoto-san mean when he says that you are not human?"

"I-I'm not. I'm a shape shifter…well…sort of, I can only shape shift into a wolf," came the unexpected reply.

Unable to keep quiet any longer, Mikey excitedly shouted, "Wow! That's so cool...Can I call you Wolfie?"

"Um…sure, I guess I have no objections to it," Esmeralda replied, slightly weirded out by the hyperactive turtle. "I'll need to get my things."

"You may do so later, after sunset. I request that you take one of my sons with you. New York is a dangerous city; I do not even allow my sons to go out alone."

"Hai, sensei," the girl bowed her head obediently.

A/N: Review if you want!