Nobody would have thought, not in their wildest dreams, that the creature ripping apart alien Krangg droids, half metallic, half machine, half reptile was someone shockingly different nine years before. If anything that was the last thing that Donnie even considered as the cyborg ripped yet another Krangg from its robot body. It was brutal. As pink ribbons of wobbly flesh hit the ground the young teen felt his stomach turn. He turned his head and heaved much to his shame. He never thought that he'd actually feel sorry for the Krangg, but he was beginning to lean that way. It was a freaking alien brain massacre down there.

"Oh dude, I think I'm gonna hurl!" Mikey uttered beside him. His baby brother's hand rested on his shoulder as the other was raised to his his mouth. Without a word he allowed himself to be Mikey's support as the younger turtle bent double.

"I know how you feel," he muttered back.

"Well as long you two puke over the side of the building and not my shell," Raphael returned unsympathetically. "If you do I'll beat the green off the both of you."

"Cool it Raph, I don't think it's pretty sight either," Leo hushed. "But in the best interest of everyone, can you two try to refrain from hurling?"

Donnie frowned. "You can't stop a gag reflex Leo-"

"Urgh! Too late!" Mikey groaned as he reached over the side of the building.

"Ah! Mikey gross!"

Donnie held onto his little brother as he retched, making a valiant attempt not to join him as his older siblings frowned.

"Alright! Enough is enough, we need to stop this guy-"

"Why? I ain't got any problems with what he's doing."

"Well I do!" Leo snapped back.

Krangg blaster fire echoed more frequently in the street below and Donnie looked down just as a plasma shot hit the mutant cyborg, richoching off his shell and spinning him about and slamming him face first on the concrete. He winced. As lethal as the mutant looked Donatello was pretty sure the guy wasn't plasma shot proof.

"C'mon! Discussion over, we're stopping this now!"

With that Leonardo was off the roof closely followed by Raphael who threw a sai at a target before he too jumped down. Donnie glanced across at Michelangelo. "You okay now Mikey?"

"Yeah, I think so. Thanks bro," Mikey pulled away, drawing the back of his hand across his mouth. "Let's get this brain butcher D!" Drawing out his nunchakus the youngest turtle vaulted the roof.

Donnie rolled his eyes at Mikey's choice of words, shaking his head as he hefted his bo staff and swiftly followed after. As much as the fellow mutant's actions turned his stomach, he was equally keen to see this turtle up close. "Let's just hope he's friendly," Donnie uttered as his feet hit the concrete and entered the fray.

HMR*

A few minutes before….

Nicky clambered out of the alley as the small group of Purple Dragons ran away screaming.

"Robo turtle!!"

"Metal monster!"

"Turtle terminator! HELP!"

The mutant cyborg paused on the roof, staring down at his handy work, quirking a wry smile. "Turtle Terminator, heh, I like the sound of that."

Nicky dashed across the roof, using his enhanced strength to leap across to the stair gantry of the adjacent building. It had been a productive night and the adrenalin flooded his veins. He needed to stop but there was still a deep seated need to rip and tear and render and he had already left four sites littered with the remains of his fights with Purple Dragons, low ranking Foot and general low lifes (either beaten unconscious or left to flee for their lives). Dumpsters and trash cans were spilled and dented, building brickwork scarred with his neko te but none of those people had been his primary target. Tonight he was hunting for Krangg.

Nicolo perched on the edge of the third building along the route he'd been taking, scanning the immediate area for any signs of activity. His synthetic right eye glowed a lurid purple. He knew those fleshy brain beasts had a warehouse or two in this vicinity.

A soft beep sounded through his software and Nicky's eyes narrowed. His scanners had picked up something. Nicky bounded across the way and sat poised on the edge of a building as a small group of Krangg droids moved crates from a van into a nearby warehouse. Nicolo didn't really care what was in the crates it was the aliens he was after.

He dropped to the ground, summoning the neko te housed in his cybernetic hand. Nicky tried to take the nearest droid by surprise, snatching it into the shadows but his victim was spotted as it was yanked into the dark putting the rest of the droids on alert. The cyborg hissed a curse under his breath as the first droid fell inert beneath his blade clad hands.

"Come out what is known as the shadows!" one of the Krangg shouted.

Nicky flexed his claws and slid into view, a snarl present on his face. "Gladly," he hissed.

If the Krangg recognised him or not in his present state was unclear but their reaction to his appearance was immediate. Blaster fire exploded all around him. With a roar Nicky barrelled into the fray, blades flashing as he tore at his hated enemy, rending limbs and ripping metal. Hell had undoubtedly broken loose.

The cyborg felt a growl fill the back of his throat as his neko te glinted in the street lights. Claws slashed out, cleaving limbs from bodies, metal skulls from necks and rending fleshy pink brains to shreds. Blaster shots continued to be fired all around him, one striking the metal panel in his shell and twisting him about as it glanced off and landing him face down on the ground.

"You wanna piece of me?!" he bellowed as he lifted himself up, his stance feral as he stared the approaching Krangg down. He was hopelessly outnumbered but it wasn't something that intimidated him at all. These creatures had already taken so much from him and they didn't care, it only fueled the fire that blazed deep within and sent his synthetic eye blazing the brightest purple light. "Come and get me!!"

He barrelled forward without a thought of the consequences, failing to catch sight of the Krangg that had managed to outflank him. Something caught his robotic leg and sent him tumbling and a second later the attacking droid collapsed in a heap beside him, a sai jabbing out of its skull. Nicky frowned looking around before casting his eyes aloft to see four shadows poised on the building he'd been perched upon. His scanners immediately told him they were mutants. Before he could react, the Krangg continued their advance on him, when he looked back they had vanished.

"What the f-"

Cutting his expletive short, Nicky felt a pressure on his shell as he was slammed back into ground. "I ain't your damn doormat Krangg!!" Nicky spat, hefting both hands beneath him and thrusting himself up. There was a startled squeal and the Krangg droid toppled off his shell.

Nicolo twisted about, cybernetic claws raised ready to tear the squirming pink occupant to shreds when an unfamiliar 'sharringg!' met his ears. His eyes snapped up to see the robot's skull lopped from its body and slump to the ground giving the screeching Krangg time to slide out of his reach. "Come back here you slimy sonafa bitch!" He lurched forward only to have a shining katana blade flash in front of his eyes, sending his warning sensors off.

"Let it go," a young but cool and collected voice sounded.

Nicolo glared up and growled. However when he saw who the sword belonged to the cyborg froze. A look of shock took over his features and a red internal alarm was suddenly activated as his cybernetic eye flashed a messages across his view screen. Primary Target Acquired. Core Directive- Destroy.

The breath caught in his throat. Holy shit. Was this guy one of the……? The scowled returned, his stance aggressive once more. He couldn't trust him any more than he could trust anybody else he'd encountered in New York since his return. "Back off!" He snarled, flexing his neko te. "Unless you wanna end up like one of these brain sacks!"

"I don't want to hurt you," the masked mutant turtle responded calmly.

Nicolo lifted himself off the ground, showing the height difference between them at least a head taller. "Nah, sorry don't believe you," the blue eyed turtle didn't even flinch as he took a step closer. Huh, the guy had guts he'd give him that. Nicky was just used to people cowering at his mere appearance. This was different though, he guessed he just wasn't that intimidating to a fellow mutant turtle?

As their mini standoff continued the remaining Krangg began to mass about them and only then did Nicky realise that the blue eyed turtle's other three friends were holding back the alien tide. Various weapons clocked up in his view screen sai, nunchuckus to kursirigama and bo staff to naginata and by the looks of it, these guys knew how to use these weapons well. Yeah, like that really bothered him. What did bother him was how efficiently the Krangg were being defeated. Not killed. Defeated as in letting the slime bags slip away to cause more pain and suffering another day. This was something that Nicky just couldn't tolerate.

The cyborg let out a roar, slashing his claws across Blue's twin katanas taking him by surprise. He staggered back giving Nicky a chance to leap past him letting him gain access to the next nearest turtle, Orange.

"No! Stop!" Blue hollered.

Nicky was on target, ready to cut Orange's shell to leap from him to the Krangg before him when Blue annoyingly shouted a warning.

"Mikey! Behind you!"

The smallest turtle whipped about, looking puzzled more than anything, then shocked as he saw Nicolo bear down upon him. The blade of his kursarigama drawn he caught Nicky's robotic neko te as his fingers sliced down. "Whoa! Dude chill! We're on your side!" He squeaked.

Orange, or 'Mikey' looked younger than Blue and as his blades pressed down on his weapon it was clear he wasn't as strong as the other, Nicky could tell that without his scanners. "The hell you are!" Nicky fumed as a flash of fear streaked across the youngster's face. "You're letting these pink slugs slime their way back to where they came from!!"

Nicky suddenly heard heard the padding of wide feet behind him, followed by the sound of something hitting the ground. His reflexes kicked in a split second too late, a foot connected with his head unbalancing him and his feet were unexpectedly kicked out from under him from the opposite side. The ground came racing up to greet him and the concrete smashed into his cybernetic eye. Warning sensors erupted and his internal view screen warped and blurred out of focus. 'Targeting Systems misaligned,' flickered briefly before syncing out.

"Shit!" Nicky rolled onto his back, glaring at the one who had managed to get the drop on him. Taller than the other two, this mutant wore a purple mask hefting a bo staff, strange choice for someone of his height he briefly mused before scowling, glaring straight into his red brown eyes.

"Mikey, you okay?"

"Yeah D, thanks bro."

Bro? Was that a figure of speech or were they really brothers? Did it matter? Not really. The Krangg were getting away, that was what mattered. Growling Nicky lurched to his feet ready to bowl Purple and Orange over when a thick well muscled arm was crooked under his chin about his neck, yanking him down.

"-the hell?!"

"Don't know when to quit, d'ya big guy?"

"The last thing I am, is a goddamn quitter!!" Nicky bellowed. He hitched his robotic leg back, trying to get some leverage bending to its limit and biting his tongue to counteract the pain.

"You have to stop this."

Urgh, it was Blue again. "I'll stop when I'm dead!" He snapped back.

From the corner of his eye he noted most of the Krangg had retreated. Nicky's temper reached its peak. These four turtles had ruined his hunt. It would be the last time they made that mistake. With an animalistic roar he gripped the arm about his throat and although he could have severed that limb from its owner's body Nicolo's blades retracted back into his metallic hand. As much as he hated these guys right now, something inside him stayed his hand from taking such grievous action. With effort, the cyborg hefted the fourth turtle off the ground behind him and managed to throw his impressive bulk over his shoulder effectively throwing him straight into Blue which felt immensely satisfying.

Hearing the startled cries Nicky left the turtles behind as he crashed into the darkness of an alleyway where he'd seen some Krangg retreat to. But with his scanners on the blink he couldn't see beyond the shadows six feet in front of him. He heard an ominous click and spun about.

"Dude watch out!"

A Krangg blaster exploded on his right and a blur of green and orange tugged him sideways. The plasma shot winged him across the side of his robotic eye instead of between them and a radiating shock of pain burst from his cybernetic wiring into his very brain. The blinding agony dropped him on the spot.

Concerned voices suddenly surrounded him as blackness began to fold in on him. This wasn't good. Nicky grimaced as the pain increased and finally became just too much to bear.

'Don't be gone too long Nicky!'

'I won't mom!'

"I won't mom," Nicolo mumurmed deleriously as the half forgotten memory blurred out of focus.

"Dude, what's he talking about?"

"I don't know Mikey," a large hand was rested gently across his masked brow. "I think his circuitry may be damaged. I need to get him back to my lab."

"No, please," Nicky rasped and consciousness finally slid out of his grasp. Then his world went black.

HMR*

Notes: So yeah, I finally caved and decided to start writing my oc Nicolo's backstory . I'll confess I've been stuck in a rut regarding GP2 I needed to flex my writing muscles and try something that I've never actually done before in the tmnt fandom, write a fanfic centred around an oc . Yeah, I never thought I'd do that either but the bug has bitten me hard and I have been working nonstop on this personal project. And I'm hoping that subconsciously it will untangle all the issues I've been having with GP2 and I can get back on track with it.

Soooo, apologies to all of you who aren't really into oc oriented fics but this I'll confess has been really helping me out. Nicky and Donnie have been easing me out of a tough time too and I'm extremely grateful for that. Thanks for your patience for letting me indulge myself dear readers.

Any follows, comments and/or favs are as always very much appreciated