Okay , I'm a little late. I am sorry for that but lemme explain. I was writing this story purely on impulse , my OC and everything but after the attention it got , I decided to actually develop a storyline. I have my character background , who he has been associated with etc. but the problem is how to implement this to the story arcs. There is also the issue of Leo's strengths and origin. This chapter -just a small part of it- explains where Leo is from. As for my followers and reviewer , -I think you expected a detailed fight- I will write you one in Alabasta.

To summarize , chapters will be longer in length and upload time -SORRY , again- but it is for the story. On a final note ; I do not own One Piece.

Zoro was quite surprised by their lookouts weapon of choice ,but didn't question it after seeing his skill with it. Moving faster than the normal people could see , soldiers seemed to just go unconscious to the untrained eye. Even Zoro only caught glimpses of Leo , a grin on his face as he knocked out soldiers left and right. 'Is he actually sick?' He thought while blocking a sword , knocking out his opponent with a swift strike using Wado Ichimonji.

Sanji stepped in front of the door leading to where Nami was resting , making sure no one tried to sneak in. Leo took down fifteen men in the blink of an eye , that was a thing that shocked the cook. 'I knew he was strong but this , this is too much' he thought , looking at the amount of unconscious enemies all over the deck.

Luffy was too angry to focus on his lookout kicking someone off the ship , looking at the fat man eating the ship.

"What the hell are you doing?!" he shouted , stomping over to the culprit." Halt! Wapol-sama is eatingand he does not like to be disturbed." Two soldiers yelled , then choked as Leo punched them in the throat.

Luffy tried punching the fat man , who opened his mouth and swallowed his upper half.

"Hmm , a little chewy." Wapol mumbled , not noticing Luffy's still stretching arms. Luffy said something inside his mouth , that wasn't heard clearly.

"What did you say?" Wapol asked , and Luffy 'Bazooka'd him to the sky. Leo smirked , now next to his captain. Suddenly he started to stagger around , and fell on his butt , unconscious.

"That idiot , fighting sick." Zoro grumbled , piggybacking Leo to the men's quarters. Leo half opened his eyes tiredly , looking at Zoro from his bed.

"What was that about?" he weakly slurred. Zoro sighed , pinching the bridge of his nose.

"The guy that tried to eat the ship asked for an Eternal Pose to something island. He attacked the ship even after we told him that we didn't have it." Leo nodded , curling into a ball under his blanket.

"Check up on Nami." Leo added just before Zoro left , who nodded in response.

-x-

Zoro woke Leo up , telling him they arrived at an island. When he went up to the deck , the crew wasn't ashore , but talking to someone Leo couldn't see.

"What is going on?" Leo asked Vivi , but before she can say anything , he tackled her to the ground.

BANG!

And in good time too , as one of the soldiers shot at where Vivi was standing just a second ago.

Leo sighed ,rolling sideways from his position on top of a blushing princess. The crew was furious and about to attack the soldiers , but Vivi stopped them.

"Luffy-san , you can't resort to violence every time something goes wrong." She stated , kneeling in front of the soldiers.

"Please help our friends , they are sick and need help." And a few seconds later , Luffy joined in. Leo was still on the ground , panting. "God , I hate the cold." He muttered , trying to get up.

After the soldiers agreed to let them in , Zoro turned to Sanji. "You should carry him until he wakes up." He said , pointing at the sleeping Leo. Normally Sanji would go against it , saying he would rather carry Nami. Sighing , he started carrying Leo on his back , who continued sleeping.

'He overworked himself , this idiot' the straw hat cook thought , looking at Leo's sweating form.

They met a hiking bear , who Dalton –the leader of the soldier army from before- told them to bow.

"We have one doctor here and she lives on top of that mountain , we call her a witch." He explained , pointing at one of the many mountains around the island.

Leo , who was awake and off Sanji's back , nodded while sipping his hot chocolate. "When does she come down?" he asked , leaning his back to the comfy chair.

Dalton looked at his eyes for a moment , before answering. "That's the thing , she comes whenever she wants , looks for patients and treats them. Then she takes whatever she wants from their homes as compensation." Leo nodded again , slowly getting up.

"Are you thinking what I am thinking?" he asked his captain , who was carrying Nami on his back. Then he nodded , and Leo turned to Dalton.

"Can I get some warm clothes?" he asked , looking at himself. His old T-shirt was dirty and thin , his shorts were , well , short and he was barefeet.

"What are you people going to do?" he asked , walking to the door to ask people for clothes.

"We are going to climb the mountain." Captain and lookout answered at the same time. "I will come with you." Sanji said , taking a drag from his cigarette.

"What are you thinking? Those two" Vivi pointed at Nami and Leo, "can't handle a trip up the mountain." She exclaimed. Leo got up from his chair , walking over to her.

"We don't really have a choice. The doctor comes when she pleases , so we need to go to her." He explained with a yawn. "Besides , I'm fine." He muttered , taking the clothes Dalton gave him.

It was a midnight blue coat and a black winter hat. Leo shrugged "Guess I'll just go with the shorts." and walked after Luffy , who had told Nami about what they were planning.

Seeing where they were headed , Dalton panicked. "Don't go up this slope , Lapans live on this side!" he exclaimed , but they had started running ahead already.

-x-

'Ugh , I hate Lapan.' Leo thought , sidestepping another one. They were doing this for half an hour now , and Leo was getting worse. His head was spinning , he couldn't feel his feet and his vision had been getting worse. 'This is pretty serious , my eyes are getting effected.' He noted , fear sinking its fangs into a new prey. Leo had a fear of going blind , which was pretty reasonable. He was always able to see everything , and only kept improving as time passed.

Back at Little Garden , he started to see the energy flow in a persons body , and had used it to knock Miss Valentine out. ' I should get back to using weapons again.' He noted bitterly. Leo was good with most weapons , ranging from daggers to bazookas.

Sanji turned to check up on their lookout , who had a faraway look in his eyes –Sanji didn't know how he could actually tell- and still kept on dodging the Lapans. 'Don't tell me he is doing it out of reflex' he thought , that shouldn't be possible. Putting the thought away from his mind for later , Sanji went back to protecting both Nami and Leo.

Said lookout was looking at his father in the eye again , who smiled in return.

"What do you want?" he asked his father , a frown creeping into his face. He didn't like hallucinations , they were tricky.

"I don't know , ask yourself." He responded , and Leo frowned , walking faster.

"Since you are basically my imagination , I am asking myself." Leo snapped , and his father frowned back at him.

"Whatever , you noticed your eyes basically draining you , right?" he asked , a hint of pride in his voice.

"Ye , so what?" he asked , trying to keep the curiosity away from his voice. His father noticed , though.

"That means they will change , not physically but they will change." Leo raised an eyebrow at that , he had noticed the improvement but didn't question it.

"They will improve further , in time. But what you need to know is there are bad sides." He explained , and Leo raised his eyebrow further.

"Until you get used to the energy that you lost after the transformation , you will be weaker." Leo mumbled unintelligible words under his breath , focusing on the road ahead.

"You might want to try and power up , kiddo."

"You , giving me actual advice? That is a first , even for a hallucination."

Leo looked up , and his father was gone.

Sanji had heard Leo talking to himself , and sped up. He needed help , fast. Luffy noticed this , and started speeding up.

Leo caught up to them , and faced a pack Lapans. "Don't they know how to give up!" Luffy yelled , and the rest of the group grunted in agreement. Suddenly , the Lapans started jumping up and down.

Leo's eyes widened. "Guys , they are trying to create an avalanche!" he yelled , turning around with the rest.

"Run!" Sanji shouted , trying to get proper footing on the snow below.

Which was when the avalanche hit , taking Leo with it.

-x-

Leo woke up on Luffy's shoulder , on the side of a cliff. Taking a deep breath , he tried to think of a solution to his captains weight problem. Luffy was carrying both Sanji and Nami.

"Okay Luffy , here is what I need you to do." He said , getting his captains attention. "I'm fine now , so let me climb with Sanji. I'm not taking no as an answer."

Five minutes later , Leo was climbing next to his captain. He turned around to look at Nami.

'Her vitals are getting worse, but she'll live.' He noted , continuing to climb.

They were getting worse , Leo had almost fell off the cliff a few times by now. Luffy's hands were bleeding and Leo was starting to feel very , very lightheaded. He threw this hand up , searching for a place to hold on to. He eventually found it , only to have it crack on him. Acting quickly , he gave all his strength into a jump and found another ledge.

"You okay?" Luffy yelled over the soaring wind , looking down at his lookout. Leo nodded , panting from well , everything that happened so far.

The cold , harsh wind hit his bleeding limbs , numbing more than half his body. Leo grit his teeth against the pain.

'I won't… die…. Here.' He kept on whispering at every movement he made , as if it was a lifeline. He didn't know how long they were climbing , but they made it to the top.

Luffy immediately collapsed , while Leo slowly sat in front of him , legs crossed. He was slowly losing consciousness , but held on.

'What's this?' he heard over the wind , causing him to look up. There were two figures , one old woman and something that Leo couldn't tell.

Grinning in content over finally reaching the top , Leo let everything from the last few days , his sickness , fatigue and the loss of energy from his eyes take over , falling unconscious.

-x-

Doctor Kureha , known as the witch among other things , couldn't believe what she was seeing. 4 patients that climbed an entire mountain to get here , while two of them were sick.

The orange haired girl was quite easy to cure , she had the medicine –even though the type of bacteria was supposed to be extinct long ago- but the tricky one had been the platinum blonde haired one. He was bitten or somehow infected by something far more deadly than kestia –the bacteria that the other girl had- , and was supposed to have killed him already.

Now she was watching over her patient , having dealt with the one wearing a straw hat and the actual blonde. His temperature was slowly dropping , but he was still infected. 'How did he deal with the hallucinations , and the pain?' Kureha mused , walking over to her medicine pack to help the poor kid.

Chopper wasn't going to take care of this one , no , this was way out of his league. Kureha didnt have the correct medicine for this kids problem , but she was using several other strong medicine to cure him. This method was highly dangerous , as it might just worsen the situation but she was willing to take the risk.

Other than that , nothing had changed with the patient except his silent murmuring –which Kureha theorized were hallucinations- and him turning around in the bed , sometimes curling into a small ball.

She was going to check his fever , when suddenly his hand grabbed her wrist in a blur. Kureha was surprised at the teens speed , even when he was sick , but what surprised her even more were his eyes. Pure yellow eyeballs , with circles of varying sizes that span for eternity gazed into her soul. She pulled her wrist back in shock , noticing the white glowing cracks that made his eyes look as if they were about to fall apart , made the kid in front of her look a dangerous foe.

'I haven't seen one of those in ages.' She though , still in a staring contest with her patient. He looked at her for a few more seconds before his eyes widened , and he let out a sigh of relief.

"Are you the doctor?" she heard him ask , making Kureha come out of her trance. His voice was younger than he looked , but that might have just been his eyes.

"Yes , I am Doctor Kureha you can call me Doctorine." She introduced herself , to which Leo nodded. They had a bit of a staring contest before Leo realized what he was supposed to respond with.

"Oh , I'm Mercy D. Leo , nice to meet you. I came here with 3 other people , where are they?" he asked , concerned.

"You were in a worse situation than them , so while my assistant healed them , I took care of you." She explained , then realized the medicine in her hands. "You need to drink these." She ordered in a commanding voice , pushing the bottles that contained strange liquids to Leo's hands.

Leo accepted the medicine with a thanks before slowly drinking each one , with Doctorine giving further instructions.

After some more examination , Doctorine said that Leo should stay in bed until they brought down his fever. Leo could only nod as cold sweat ran down his face , lying down while Doctorine took care of him.

Leo didn't know how much time passed as he kept on blacking out , but he woke up to the sound of a boom coming nearby. Seeing how he was alone in the room , he looked out the window to see the man that tried to eat the Going Merry. Only difference was that he looked like a house , that had cannons for arms.

Stumbling down the hallway , Leo shuddered , cold wind passing him. Walking towards the direction he guessed was the entrance to this frozen castle , Leo grit his teeth. 'My eyes will be the death of me' he thought with a dark , humorless grin. 'This reminds me of that time when dad left me to 'train' on a winter island' Leo chuckled , he could still remember what had transpired that day.

"What are we doing here?" a ten year old Leo asked , turning to his father. His father hadn't changed since he met him , his face the same –only just showing signs of aging- with that kind smile. He had cut his long brown hair really short , saying the time had come for it to go. Leo would've took him seriously , but then realized that he was crying for the strands left on the ground.

Shaking himself out of his thoughts , Leo looked at his fathers kind –and evil- smile , nervous. His father had woken him up , ordering to pack his belongings for a mission. Leo was kind of used to this , considering the crew that his father was in.

"This is for you , you need to get stronger Leo." His father explained to Leo , who was looking at him with curiosity in his spinning eyes. Patting him on the back , his father then explained what they were going to do.

"You see , this here is one of the harshest winter islands in 'New World' my sweet Leo." He held his son so that he wouldn't escape. " You have supplies to last two weeks , then you will stay here for a year by yourself." Leo was trying to get out of his grip , to no avail. His father then pushed him off the ship with a shout. "Now , GO!"

And with that , Leo was alone in the harshest winter island on the New World.

Leo shook his head , realizing that he had reached his destination. Smiling at Sanji , who had noticed him , he sat in front of him.

Sanji was glad to see Leo was alright , until he noticed he wasn't exactly well. His skin was returning to its pale color and he seemed a bit more energized , but Sanji knew that even walking from his room to the front door took a lot out of him. He was panting , even though Sanji theorized that Leo himself didn't notice the change.

Doctorine was watching Leo with a keen eye , looking for any symptoms that might rise again. Chopper was chasing after Wapol with that other kid around the castle , and she was confident that Chopper would handle it.

Leo leaned back , his head touching the front gates of the castle. If his hallucination was right , his eyes were weakening him until they somehow upgraded themselves. At least I'm not hallucinating , Leo though with another sigh. His eyes started itching and even though he tried to ignore it , he was soon rubbing his eyes. He didn't like this , changes might be good but it was going to have some bad sides. How long will he stay like this?

Weakness.

It was another one of Leo's fears. Being unable to do anything without help , being unable to help his friends terrified him. He didn't remember feeling this weak for a long time , yet the feeling wasn't foreign to him.

I had failed other people ,haven't I? He thought , mood turning grim as he unconsciously stiffening at the memory.

He was around twelve years old , the changes that the winter island had showing on his features. Leo was wearing a black half sleeved hoodie and knee level shorts. If someone were to see him in this state , they would run away in terror. The reason for that normally would be his eyes , and Leo would've preferred that.

But that wasn't the case.

"Leo!" someone cried out , and he started shaking.

"Leo!" the voice repeated , falling on deaf ears as Leo just stared at the bloody mess in front of him.

"Leo!" Sanji yelled again , shaking the boy awake. Leo blinked once , twice and looked up at whoever was shaking him.

"What is it?" Leo yawned , looking around him. They were back in his room , with everyone else. When did we get here? Leo looked at Sanji , expecting an answer.

"Well , you fell asleep a bit after Luffy punched that Wapol bastard off the island. Chopper had to take care of you since your fever rose short after we carried you inside." He explained , pointing at the reindeer. Is this Chopper? He thought , curiosity making its way into his features. Sanji , who had noticed this , went on.

"Chopper is a reindeer who ate the Human Human Fruit , otherwise he is normal." He explained the situation , and Leo nodded in acceptance and stared at Chopper with increased interest.

They stared at each other for some time.

Chopper , who was looking at Leo's eyes. He returned the stare with his damaged looking orbs , until his eyes began spinning.

"AAAHHH!" Chopper yelled , jumping backwards in shock. Since when did humans had spinning eyes like that?!

Leo just tilted his head in confusion , then kept staring.

"What is with your eyes?" Chopper asked , now behind Luffy.

"I was born with them." Leo stated , then turned to Sanji.

"How long was I out?" he asked , slowly getting up. Sanji looked confused for a moment then put himself together.

"Three hours I think." He replied , going over today's events in his head.

-x-

The crew was back in the Going Merry , and everyone was minding their own thing.

For Leo this meant lying in bed while Chopper –their new doctor- took care of him. Leo was not amused with the situation.

"I am fine , can I go now?" Leo grumbled , not liking the fact that they had been doing this for hours.

"No , even Doctorine warned me to take care of you since you aren't fully healed yet!" Chopper responded , shifting through books and checking Leo's condition at a fast pace.

This was the main topic of discussion between the lookout and doctor since they started sailing. The crew celebrated their new friend and immediately after the party that lasted a whole day , Chopper started taking care of him.

Leo knew why he was doing this and accepted his help but there was a small problem.

It was boring. Leo had talked about medicine and how Chopper learned to treat people, but that kind of talk could only last so long until they eventually stopped talking.

After a few more hours of bugging their new doctor , Leo got the permission to leave his prison. To say he darted out the door would be an understatement. Leo crashed into their captain , who was running from Zoro , the minute he got out. They flew to the mast , carried by the Leo's momentum.

Luffy laughed , running with Leo in tow. He didn't know when he got better but Luffy didn't argue , finding the chase really fun. He bolted away from Zoro at max speed , only slightly matches by Leo , who was running next to him.

-x-

After the war that regular humans call dinner , Leo retreated to Chopper's office. He had been feeling slower since waking up , which he tried to change by running around the ship with Luffy. Leo knew he could use his Devil Fruit to enhance his power , but despised the fruit itself.

Entering the dark room , his thoughts kept him spaced out as he lay down on the soft bed. Leo had been force fed the unknown fruit when he was little and only used when necessary. His torturers had used waterboarding as a main session and , thinking it would be easier to break him , made him eat an unknown fruit. The power it gave Leo was purely luck on his part , as it could've been some useless fruit that would only help them.

I'll take a walk. He first found a mirror to check his eyes , trying to see what might change with the appearance of his already special eyes. He saw nothing different , the cracks were gone and the only noticeable thing was that they softly glowed , emanating some sort of yellow aura.

Is this some sort of dust? He wondered , examining the dust-like texture in front of him. My eyes can't see what it actually is , he noted.

Trying to find anything different with his sight , Leo turned to the door. And gasped at what he saw.

What's this? Leo was kind of surprised at what lay before him , he was looking at Choppers desk. Then it began to change , not in form or anything , but it became clear each passing second. After about two seconds , Leo could see every part of the doctors desk. The texture and patterns that he used to get close were revealed to him from afar.

"What are you doing up?" a voice brought Leo out of his musings. He turned to find Chopper , only that he saw much more.

The reindeers form had a purple energy that outlined every part of his internals , from the smallest veins to the hardest bone , Leo could see it all. There were large points in which the purple energy seemed to gather and disperse.

Then it all ticked together in Leo's mind.

I can see pressure points! His outburst against Miss Valentine in Little Garden came to mind. I had done it on instinct and she just… lost herself.

"Are you okay?" Chopper asked , bringing Leo back to reality.

"Yes , just thinking. What are you doing here?" Leo replied with a small smile.

"I decided to check up on you , to see if you had a fever." The doctor explained with a small yawn. Leo nodded , lying back down on his bed.

After Chopper checked for anything wrong , he left with positive results. Although Leo was quite troubled about the change of his eyes , he shrugged it off and went to sleep.

I'll figure it out tomorrow.