Alright thanks to black ryu I am publishing this story and I will be making mistakes big time but I want you to keep in mind the character is more like Guy and Lee in the Naruto verse and Naruto is a girl so lets get on with it. Oh one last thing the Demi Fiend is more like blood line trait in this universe so just go with it.
Shin looked towards his village as it burned his legs already ached from running but he had to make it in time to save someone, anyone he could as he neared the gates he could already tell that the guards and two squads were dead just by first look. Still he ran inside looking for any sign of life that's when he saw them Chiaki and Isamu were standing there looking at a house as it burned. "Hey Chiaki, Isamu what the hell is going on?" It's the last thing Shin says before a very powerful pain erupts from his chest a few centimetres away from his heart. Looking down at the blade he looks behind only to see Hikawa-Sensei standing with his signature Katana in hand. Shin crumples to the ground looking up he can see their faces clearly and they looked detached as if his life meant nothing.
"Well I guess it was bound to happen however I thought you would have gotten here sooner it could have spared you some pain." As Hikawa was about to flip through the hand seals he's stopped.
"Wait one more won't make a difference besides I want to try another one on him." Shin's eyes were only showing shadows just as his hearing began to fail but it was woman that much he was sure of. Then it happened his wound began to close and he began to feel it hate, anger, sadness, and despair flooded him as he began to scream at the torment he could feel all the villagers last moments of these emotions and it was hurting him. Then his body underwent a change before reverting back. His chakra felt wrong like pure corruption had warped it though with the little he had. He couldn't perform hand seals to do much of anything instead he learned plenty of Taijutsu to compensate. Chiaki had the most Chakra reserve's as she could spam some pretty hefty stuff however Isamu had the most control.
At some point the rain began to fall as Shin brought his knees closer to his chest and he just wanted to die right then and there. His body decided to betray him as he began to walk out the village past the burnt homes and corpses that littered the ground and yet he wasn't crying it's as if all the tears he had left him. Making his way to a fork he looks at the roads one lead to Konoha the other to Wave. Heading down the path to Wave he could feel something pull him there it would take three days of just straight walking at the pace he was going.
In Wave Three days later
Naruko and Sosuke were in a dire situation with Haku jumping from mirror to mirror while throwing Senbon there way by the look of the girl and boy they were covered in bruises and with more than a few senbon sticking out of them only adding to the pain. Kakashi and Sakura were outside the mirrors with Sakura trying to get inside while Kakashi was handling Zabuza as the two Jonins were going at it with every trick they could think of. Until the air changed and a strange Chakra entered the area it felt wrong as if pure evil entered the area. Everyone stopped to look in the direction of the strange energy. What they saw was a thirteen year old boy who had obsidian black hair neatly cropped with out a shirt on that showed some of the muscles begin to develop and a tan from the sun beating down on his skin. His pants were torn at the legs from the knees down revealing black bandages and sandals. His eyes were alarming they were somewhat dead. Haku looked the boy over aside from his clothes being tattered and torn he looked well and perfectly fit.
"Hey who the hell are you?" Naruko yelled at the strange teen.
'Is he an enemy reinforcement?' Everybody else thought.
Shin didn't respond to Naruko instead he drew a Kunai and threw it causing a scratch on Naruto's cheek and going past until it hit soft flesh. Nobody moved for a few seconds looking at the strange boy until a body hit the ground. Turning around they saw the target of the kunai as a mercenary thug. One out of fifty who were standing there looking like they wanted to rape murder and pillage.
"Well I guess that was unexpected but these men do cost money and one less only saves me money." Gato a short man with sunglasses receding hair and a mustachio in a three piece green suit and had his arm in a sling. "However it doesn't matter now because your all going to die along with everyone in that village."
"Gato you traitor should have known better to trust you." Zabuza is the most animated as he moves into an offensive stance with Kakashi next to him. Haku stood next to the pigtailed blonde that was Naruko holding a senbon up in order to defend himself. "Looks like we aren't enemies right now." The boy in the ANBU gear replies.
"I won't forgive the hurt you've caused." Shin then lets the chakra seep into him as his anger skyrockets and his eyes turn blood red with an eerie glow to them. Before leaping into the air and coming down with enough force to kill two men before standing there it was fear before the boy was impaled by six swords before he went on the offensive and began killing men with just his bare hands Zabuza came in with his sword and cut two men in half the strange teen followed up by throwing some shuriken into the arms of a pair of men that were close to Zabuza who were taken down by senbons by Haku. Gato was standing with about a dozen of the men he hired to kill Team 7 and Zabuza until pain erupted from his chest and he looked down to find Kakashi's hand sticking out of it having performed a rasengan and caused the little weasels heart to explode. Those who were left got the hint and ran for the boat at the bottom of the bridge.
"Wow they sure can run can't they." Kakashi offered a eye smile at team 7.
"Hmmph, I can't believe that snake thought he could off me with just some hired help." Zabuza grumbled.
"Well if that strange boy hadn't shown up I guess we would have beaten each other until we could barely move by the way where is he?" Haku was looking around for the strange teen.
"You two should sit down you're injured and look pretty beat." Shin was in front of Naruko and Sosuke offering a polite smile. That was when he took in there appearances Naruko was developing a high b low c cup breasts with her hair put into two pigtails and whisker marks on both cheeks with bright blue eyes that just looked tired and sore right now. Sosuke had jet black hair that seemed to defy gravity some and black eyes that burned with determination. Naruko wore an orange jump suit and Sosuke wore a blue shirt with black pants. Finally Naruko collapsed into Shin's arms Haku came over and helped get her into a sitting position against a wall of the bridge. Sosuke was glaring at the two boys before sitting next to Naruko who was breathing hard with her eyes closed. Sakura made her way over to her two team mates.
"Um where am I? And how'd I get here." Shin asked which made everyone gave him a funny look.
"You don't remember?" Haku looked the boy over 'Not a scratch I could have sworn he was impaled.'
"No, sorry the last thing I remember is my village burning to the ground."
"Where's your village?"
"I can't remember."
Kakashi and Zabuza watched the whole exchange no news reached them of any ninja villages being destroyed but they have been on this mission for a week now.
"Best for us to leave now." Zabuza looks over at Haku who nods.
"Farewell I hope we see each other again." Shin smiles politely at the two as they leave.
The Villagers happened to show up at that exact moment.
So yeah ninja Demi Fiend in the Naruto universe.
