A/N: Hey everyone! Sorry about last week's update, but this chappy has been hell to write. I did get to see the latest few episodes of TMNT and they've been pretty good. Some of you might know about my slight disappointment with the new series, but I'm warming up to it. I think it was because of the new Karai. I think she's spectacular. Anyways, please enjoy!

Alright, it seems something went wrong when I uploaded, so let's try this again, shall we?

Disclaimer: I do not own the TMNT.

Pain. Without it, he wouldn't have thought he was alive. Raphael wheezed his breaths. How it hurt to breathe. Leo had attacked him. Raph didn't know his brother could move that fast. His chest ached with each breath. He now lay on Don's bed, having been carefully tended to. He feared for his two younger brothers. They had gone after Leo in hopes to drag him back alive or unconscious. Raphael ground his teeth angrily. He had wanted to pursue Leo as well. It wasn't safe for either of his younger brothers to face Leo in a fight.

Although, Raph knew something was wrong with their homicidal leader. It wasn't even the homicidal bit. Leo had looked terrified after Don had struck him. It was as if Leo had just realized that he had nearly killed his brother. Like something else had driven him to attack Raphael.

It was unnerving, but it explained a lot if Raph thought about it. A soft furred hand brushed against Raphael's forehead. The terrapin visibly relaxed under the tender touch.

"I am sorry, my son." The elderly master whispered softly. "I have created a monster."

...

"Mikey, hurry, this way!"

Clang!

"Don! Did you hear that?"

"Yeah, hurry!"

The two turtles rushed through the sewer tunnels, following the sounds of clanging metal. They heard a cry of pain and doubled their efforts. Many thoughts raced through the two ninjas minds. Was Leo in trouble, or was someone else in trouble because of him? The two could not place it, but they knew they needed to find their brother quickly and take him back to the lair by any means necessary.

"Donnie, why did Leo attack Raph? It doesn't make any sense!" Mikey asked his brother as they sprinted.

Don shook his head. "Raph called Leo a murderer, and I guess Leo snapped. I... I don't want to believe it, but you saw Raph. Nothing but Shredder could have done that to him. I can't believe Leo could have done something so cruel to Raph. Mikey, he tried to strangle him to death."

Mikey swallowed as he ran alongside his brother. "Leo always seemed the least likely to do something like this, Donnie. He was our big brother! He was supposed to protect us!"

"He is our big brother, Mikey. We'll just have to get him to come back to the lair and maybe we can fix everything."

"You can't fix a person, Donnie! It doesn't work like that!"

"Mikey, I didn't-oh no. Oh no. Oh no." Don's fierce tone drowned to a whisper as the coppery scent of blood filled the air. The two brothers froze in their tracks as they stood just a few feet away from two almost identical corpses. Green skin. Athletic build. Rough carapace and scarred bodies. Mikey raced forward, shoving Don aside and dropping to his knees beside the still forms that were cradled in each other's arms. He frantically felt for a pulse on either body and turned to Don with enormous terrified eyes.

"Donnie, help them! Help Leo!"

Don slowly approached, unable to voice his thoughts. Identical turtles. Both dead.

Twins.

"Mikey, they're dead, there's nothing I can do for them anymore except," Don began.

There was a rasping sound, like that of something struggling to breathe. One of the turtle's eyes slowly cracked open. His gaze was pale gray, almost crystalline.

"Leo..." Mikey whispered cautiously.

The turtle's gaze tiredly flicked to the orange masked terrapin. Vibrant markings were visible on his blood specked features. He weakly breathed in another breath and turned his gaze back to the corpse he clutched in his arms.

"Donnie! Leo's still alive, we can save him!"

Don rushed to his elder brother's side and nodded to Mikey. "He's in bad shape, but these swords just barely missed his vital organs by the looks of it. He'll make it, we need to get him out of here though, quick!"

Mikey nodded and the two brothers quickly moved to carry the marked turtle. Naito uttered a low growl, not having the strength to do more than that. He kept his grip latched onto his twin and struggled weakly. He would not be torn away from Leo a second time. He could not leave his twin again!

He had not the strength and his brother's managed to pry him from Leo's body. The marked turtle's eyes were wet and burned with tears. He snarled at his brothers, his ability to speak had waned just like the rest of him. Leo's anti mutagen had actually saved him. It kept rebuilding his organs even as it tore them down. His legs were useless again. He was paralyzed from the hips down. Naito still struggled in their grip with animalistic sounds and he kept trying to reach for Leo. His brothers carried him away, hurrying to the lair.

Naito stared at his twin's body as his brothers carried him away. He closed his eyes and went limp in his brothers' grip. Defeated. Naito's clawed hands twitched. When would his brothers realize he was different?

Why couldn't they have left him with Leo. His beloved twin brother. His REAL brother. Now Leo was alone again. Just like he had been all those years ago. Leo was laying in sewer water, wounded, dying, and alone. No one should ever have to die alone. Naito didn't even let his victims die alone. He knew what it was like to be alone. He knew what it was like to be dying and alone. It was a cruel thing. No one wanted to die alone.

Tears gently streamed down his cheeks. He had failed his brother again. "Forgive me, Leo..." He thought sadly.

...

Raph glanced up at the sound of padding feet. Mikey and Don entered the lab carrying a bloody mess that could only have been their brother. He stared. Was Leo even alive?

Master Splinter stared as well. He had thought Leonardo would have ran off far away and never return. He tensed. Were Leonardo's wounds self inflicted?

Don and Mikey gently laid their eldest brother on a cot and Don took charge. He quickly raced about, cleaning and sterilizing wounds. He rushed himself, Raphael noticed. Don finished up and ran off with Mikey tailing him. The two conscious members of the family blinked at the sudden departure. Raph glanced at his older brother and tensed.

Naito's eyes cracked open. They drifted over to Raphael. The red masked turtle stared. Naito's eyes were filled with pain. Naito turned his gaze to Master Splinter. The elderly ninja stood and approached the wounded turtle. He knelt by Naito's head and whispered something. Naito flinched somewhat and shook his head. He pointed to his eyes and then to himself.

Master Splinter frowned. He shook his head and spoke again in that hushed tone. Naito shook his head again. Raphael watched. A growing pressure built up in his chest and filled his head. He ground his teeth angrily.

Leonardo was a murderer. A serial killer. A homicidal nutcase. Why was Master Splinter talking to him so calmly? Was it because Leo was the favorite? He'd always been the favorite! Despite everything that had happened, Master Splinter still saw Leo as the favorite! Bullshit! Where we're his other brothers to back him up? Weren't they at all worried about Raphael? He had only just been nearly strangled to death by their dear asshole older brother! Why had Don and Mikey ran off and left their murderous older brother here? Were they running away from the problem? Like cowards! A furious growl rumbled in his throat and pain landed through his chest.

"Are you fuckin' kidding me?! There's a fuckin' murder here in the family and yer' just gonna talk to him? Is everyone forgetting that Leo tried to murder me!"

Naito's gray gaze darted up to face Raphael and the younger turtle found himself stilled by the pain, anger, and sorrow in his older brother's gaze.

"Leo never tried to kill you. It was me, Raphael." Naito rumbled dangerously. Splinter froze and stared at Naito. His love for his adoptive brothers was only rivaled by his love for his twin, who was no longer with him. His twin was gone again. This time, he could not count on Leo to return from the dead. Naito had slain his beloved twin brother twice. He found that he didn't care if his adoptive brothers hated him or not.

At one point, he had cared. That was when he had begun to forget the real Leo. He had been blinded by emotion and guilt. After killing his twin a second time, Naito could only feel guilt for him. Raphael was alive and well and did not have to live with what either twin had been forced to endure. Raphael had had the better end of the stick than the twins.

Raph shook off his stillness and glared, their sensei was forgotten then. Splinter watched silently, conflicting emotions waged a war inside of him. Naito was different again.

"Are you a fucking psycho now, Leo? Huh? Is that it? Is that why you fucking," Raph began, ignoring the pain that accompanied each word he spat.

Naito's eyes flared dangerously. "Do not shame his name once more, Raphael. I am not Leonardo. My name is Naito. If you want to curse at me, then use my real name."

Raph sputtered curse words angrily at being interrupted by Naito's seemingly mad spouts. "You're fucking crazy, Leo! You got two personalities now?! Fucking psychopath murderer." Raph snarled.

"I am not Leo, you idiot!" Naito snarled back. All brotherly affection he had previously held was gone and replaced with anger. Naito was but a shell of the fake Leonardo he had been. His world had fallen apart three times today. Raphael had found his big murderous secret. He had attacked Raphael with the intent to kill him. He had killed his twin just as they were reunited. His life, it seemed, was doomed to be a tragedy. He was sick of it. Sick of enduring the pain, the insults, and the blame for everything. He wanted out of this all. His reasons for being Leonardo were all gone. He was Naito again. He was nothing again. Alone. No, he had always been alone. He had always been alone.

He clenched his left hand into a fist and glared daggers at Raphael.

Raph glared back, not having come up with a comeback yet while Master Splinter remained uncharacteristically silent. He hadn't reprimanded Raph for his language. He hadn't smacked Naito for saying what he had. He hadn't done anything but sit and watch with a blank expression. Naito wasn't sure what to make of it, but at this point he didn't care.

Just as Raph opened his mouth to spit an insult at Naito, Don and Mikey shuffled into the room and carried a battered and bloody body to a cot.

Naito stiffened and sat up quickly, ignoring the agonizing pain that tore through his body. His gray gazed dulled to one of worry. Raph stared at the wounded newcomer. The terrapin was nearly identical to Naito, with the exception of an ugly brown scar on the side of his head and the lack of colorful markings on his face. Dried blood was encrusted on his body around his abdomen. Don became a whirlwind as Mikey retreated to Splinter' s side. Their master was the only one who seemed unchanged by everything. He was the only sense of normalcy in naive Mikey's mind.

Naito stared at his twin. Leo had to dead, but why would Don be working to mend his twin's wounds then? Could it be that Leo was still alive? Naito swallowed fearfully. His twin brother. His beloved Leo. Alive. It was a desperate thought. It was a hopeful thought. He shot Raph a look and the younger turtle turned to him. Naito had changed again. Gone was his anger. Gone was his sorrow. Gone was his pain. Naito held a serious and calm expression dashed with but a pinch of guilt. Raph met his gaze with a confused expression.

Naito nodded. "As I said, I am not Leo. He is." He said in a subdued tone, nodding to the unconscious terrapin. He ignored the possibility of Leo dying here. He trusted Don to save his twin. Don was intelligent and capable and he could work miracles with even the most dire of injuries. Naito had to trust him.
Still, he could see that his adoptive brothers were listening to him, even Donatello.

"I am Leo's twin brother, Naito. I was separated from the rest of you when we all fell into the sewers. I was crippled. I was malnourished. I was an animal. I was desperate. I was... I did what I could to survive. Sometimes, that meant I had to kill."

Master Splinter tensed.

"I killed a human when I was seven. He was going to kill me and I wanted to survive. So I killed him."

Raph made to say something insulting but a look from Splinter silenced him.
"I didn't have the same reason... when I attacked Leo. He had abandoned me and that made me angry beyond reason. I remembered the power I had over the human and I wanted Leo to know the pain I had endured. I thought I had killed him. After that, I couldn't face myself. I was cursed. I had... have... a monster deep inside of me. It pushes me to kill. When I don't kill, I lose control. Like I did with you, Raph. I'm not your brother. I'm not even the person all of you thought I was."

"But,that doesn't mean I never loved any of you, because I did. I do. I even tried to... I even tried to kill myself to save all of you." He lied the latter as he nearly revealed Leo's intentions for his family. Leo was his priority right now.
All was silent for a moment.

The silence was broken by harsh laughter. All eyes turned to Raphael. The red masked turtle leveled a glare on Naito. His amber eyes blazed with anger.
"You expect a story like that t'make us pity you? You say you've been killing since you were seven? You think that makes us feel sorry for ya'? Yer' fucking pathetic. Yer' fucking pathetic! I knew there was somethin' wrong with ya' after all these years! Not only did you lie to me about everythin'. You lied to all of us! You killed your own twin! Twice! If anyone deserves t'die, Retribution, then it's you!" He snapped, spitting the name like a disgusting drink.

Everyone else was silent for a moment.

"As much as I hate to admit, Raph is right." Mikey whispered almost silently.

Naito shot his brothers venomous looks."If my death brings closure, then so be it. I will not fight back."

"No, it's not right. I just worked to save you! Don't any of you realize how precious life is? Don't you realize how fragile we are? Le-Naito is a testament to that! He's survived. He deserves punishment, yes, but killing is not the answer! Are we going to be hypocrites by killing someone-our brother!-for killing!? No, you guys are not going to kill him while I'm here."

"Are you an idiot? Don't you-" Raph began.

"Enough!" Master Splinter snapped, rising to his feet. He shot all of his sons a fixed glare.

"You do not decide who lives and dies in this family. That right alone belongs to the head of family. Your brother made a decision and he must face the consequences, but now is not the time for such action. Leonardo has returned to us. Have all of you forgotten that we have another member of this family with us who needs all the assistance that is available?"

The turtles were silent, although Raph held a fixed glare on Naito who ignored him.

...

Days passed. No one talked to Naito. Michelangelo left food for him, but that was all. He recovered his strength and his wounds knitted. He was faster at recovering than he had thought. Still no one had noticed his swift recovery. Naito was healthy and whole again. That surprised him. He should have fallen apart by now. His genetic code should have been broken. Why was he still sentient and in his mutant form? If anything, he was stronger now. His body had never recovered from something so quickly.

He ran an unclawed hand over the scars on his plastron where Leo had run him through with his katana. He didn't know what to make of it. Had Leo failed in his anti-mutagen? It had been working at first. It was working really well. Naito had felt everything breaking down in his body and being rearranged. It was extremely painful at the time. Somehow, his body had recovered from it.
Naito glanced at his twin brother. Leo lay on a bed, his abdomen was wrapped and his eyes were closed while his chest rose and fell slowly. Naito sighed and relaxed back into the bed. How would Leo react when he awoke to find the family that abandoned him?

A/N: Sorry if this update was a little short or... different, but I'm uploading from my kindle, so it's really time consuming to edit. I'll have the next chapter ready soon, and I will have a few new fics coming out soon. Also, I'm working on my novel again, so updates may be a little slow.