Itachi in the one piece world 3

Cannonballs flew overhead as the Straw Hats were all gathered on the deck of the Thousand Sunny. Unbeknownst to them certain mentors were preventing Marines across the entire archipelago from advancing on their position. Itachi, who had dropped Susano'o and deactivated his Sharingan, was quickly mobbed by Chopper and Usopp who began introducing themselves to their new crewmate. Nami rushed over to Robin and began to make sure she was ok and was about to pull her into their shared room to discuss the events when Luffy began issuing orders.

"Oi Zoro! Brook! Release the sails!" Luffy yells as Rayleigh leaps back towards the land of Grove 42.

The two swordsmen quickly scale the mast and cut the knots binding the sails. This causes the ship to begin to sink under the water due to the resin coating, which had been applied by Rayleigh shortly after he had left the Kujas while they were helping Luffy and Itachi finish their disguises. Itachi hadn't been expecting this to happen especially since the main thing you don't want a ship to do is sink. Luffy and everyone seemed ecstatic that it was happening and Rayleigh wasn't concerned either as he was waving from the shore; Chopper seemed to notice Itachi's confusion and got his attention.

"Uhh Itachi-san are you okay?" Chopper asked rather shyly as he was somewhat nervous of the man who made such an awesome entrance.

Itachi looked down towards the voice and saw a small deer which was currently looking up at him with a slightly nervous look in his eyes; crouching down to Chopper's height he spoke quietly

"Deer-san why is no one concerned with the ship sinking"

'I can't believe someone realised I'm a Reindeer and not a Raccoon Dog' Chopper thought happily and was about to do his happy dance when he realised Itachi was looking at him expecting an answer.

"Oh don't worry we are going to Fishman Island and since its at the bottom of the ocean we needed to have the Sunny coated in a special resin so we can sail underwater" Chopper explain to Itachi which allowed him to make sense of the situation, "I understand Deer-san thank you... if I may ask another question, How are you speaking? I was unaware Deer could speak to humans" Itachi asked as he and Chopper walk across the deck towards Luffy who was chatting with some of the other crewmembers.

"Oh I ate the Human-Human Devil Fruit and it let me do things humans can do like speak and understand complex stuff like medicine which is why I'm the ship's doctor" Chopper said with pride.

"I see and does everyone here have specific roles or is it just certain people" Itachi said thoroughly interested in his new companions and eager to learn their names and roles.

"Well Luffy is our Captain but you already know that, Zoro is the Swordsman of the ship and he's pretty much the Vice Captain but it's not an official thing he was just the second crewmember" Chopper says pointing at the green haired man with three swords who was currently talking with Usopp about how much he had changed over the two years.

"Next we have Sanji who is the Cook of the crew and he's kind of a pervert or at least that's what Nami sometimes calls him and Brook" Chopper continues as he points towards the well dressed blonde who as soon Choppers finished his flew backwards from a nose bleed which reminded Itachi of a certain Sannin. Itachi smirks as he nods to Chopper and waits for him to continue.

"The Shipwright is Franky, he actually built the ship from scratch and he's a robot which is AWESOME" Chopper yells with stars in his eyes, seeing this makes Itachi chuckle softly. He had already decided he liked this little reindeer and hoped he got on with the others as well as he did Chopper.

"Usopp is our Sniper and he's done so many awesome things like fighting Sea Kings and defeating whole armies on his own" Chopper continues pointing out the long nosed man who Itachi had labelled as something of a liar but still seemed like a friendly person. "For some reason Nami and Robin say I shouldn't believe everything he says but Usopp wouldn't lie; anyway the next person is Brook and he's our Musician, he's also our second swordsman and ate a devil fruit like me, Luffy and Robin".

Itachi looks at the person Chopper was pointing out as Brook as was shocked for the second time today; Brook was in fact a skeleton... a well dressed skeleton but a skeleton nonetheless. 'Sweet Kami how is he moving with no muscles and he is drinking tea...HOW!?" Itachi thought erratically but still thankful he had trained his features to remain impassive when he joined the Akatsuki. Itachi was forced out of his thoughts by Chopper pulling him towards the two members Chopper had yet to introduce.

Itachi looked ahead and saw that Chopper was leading him towards the two women of the crew. The first thing Itachi noticed was they were gorgeous, easily the two most attractive women he had seen and Itachi had spent extended time around Boa Hancock.

"Itachi meet Nami and Robin" Chopper said as he stood next to Nami who picked him up and sat him in her lap. Itachi looked at the two women individually; Robin was for lack of a better word, radiant. She was a few years older than Itachi which the young Uchiha could tell not by her face but by the way she carried herself. Her features were sharper then Nami's and bright blue eyes which were filled with mirth and confidence. She gave off an aura of someone who was knowledgeable as well as strong in her own right which Itachi found to be refreshing. This was because Itachi had his fair share of fan girls throughout his life even during his time in the Akatsuki and none of them were memorable in the slightest, all they cared about was their appearance and dating the "coolest" Shinobi in the village. Robin's body only helped her already memorising aura and gorgeous face; she had curves in the right places and very large breasts which were covered by a small blue jacket which had been zipped up halfway and she had a long sari like skirt covering her long legs.

Her friend Nami was also an extremely well endowed woman who had flowing orange hair, a beautiful face with softer features and bright brown eyes. Much like Robin she had pronounced curves which would make any man flustered; Nami was around Itachi's age or perhaps a year or two younger, another thing which caught Itachi's eye was her dress sense which was just as revealing as Robins except in a more direct way. Nami was dressed in a small green bikini top which wasn't doing the best job of covering her up, a pair of jeans which reached her ankles and heeled sandals which put her slightly taller than Luffy. Now despite his stoic exterior which he had developed in order to do the tasks such as killing his clan and hunting innocent Jinchuriki to capture them and extract their power, Itachi was attracted to women despite what Kisame might say... asshole. This attraction to women however was causing him considerable trouble as he was struggling from keeping his eyes from drifting downwards as they both greeted Itachi and began conversing with him and Chopper.

"So you're our newest crew member huh? I wonder how long Luffy pestered you for" Nami says with giggle which caused Robin and Chopper to giggle as well as they recall their captain's antics over their journey

"Luffy-kun repeatedly asked me throughout our two year training trip, he would even wake me up in the night to ask me so I simply agreed to join to save myself the headache" Itachi said as the others laughed at the persistence of their captain. Robin then decides to speak about the events which transpired before their departure.

"I don't believe I thanked you for saving me Uchiha-san so thank you" Robin says with a sincere smile.

"It was no problem. What kind of person would I be if I let you get hurt when I could prevent it?" Itachi replies with a small smile of his own which makes Robin blush lightly. Itachi failed to notice this as out the corner of his eye he sees Luffy waving him over; sighing to himself Itachi excuses himself and approached Luffy who was speaking to Zoro and Sanji.

With Robin, Chopper and Nami

"So what do you think of Itachi" Chopper asks absentmindedly from Nami's lap, Robin looks at Nami and sees a wolfish grin directed at her; already guessing what she was implying Robin forces down a blush and answers Chopper.

"He seems really nice and he is so polite" Robin say's to Chopper while trying to ignore the smirk on Nami's face.

Nami thankfully didn't have anything to add to the discussion and settled for smiling sweetly at Robin and nodding her head in agreement. Chopper who is completely oblivious to the two women's wordless dispute decides to weigh in his opinion of Itachi.

"He seems really nice and I hope he likes all of us; I wonder how he met Luffy though?"

"Maybe he fought in the War of the Best or was freed from Impel Down" Nami suggests but none of them were sure as they pondered in silence.

Back with Itachi

"Luffy-kun you wished to speak with me?" Itachi asks as he approached his captain who was speaking with Zoro and Sanji.

"Yeah Itachi this is Zoro and Sanji" Luffy says with a grin as the aforementioned crewmembers nod their heads and Sanji leans over to offer Itachi a handshake which was accepted readily. 'They are the two Luffy constantly told me were the strongest besides him... I can feel that this is true however Luffy is leaps and bounds ahead of both of them' he thought as he looked at the Chef and Swordsman in front of him.

"Luffy-kun, where are we going?" Itachi asks as he peered into the dark abyss surrounding the ship "we have been simply descending further and further into the ocean"

"Oh that's because Fishman Island is reeeeeeeeeeeally far down and Nami says we haven't sunk enough yet" Luffy explains as he points at Nami who had moved to the helm of the ship.

While Luffy, Itachi, Sanji and Zoro were speaking Usopp and Franky approached and introduced themselves to Itachi. After the introductions Luffy begins to share the food which Hancock had made for him.

"Hey I wonder where Hatchan is..."Usopp says curiously between mouthfuls of food "I swear he was supposed to guide us to Fishman Island".

Franky puts down his food and stands up, clearing his throat he gains everybody's attention. "Everyone" he says loudly "Hatchan isn't here because he was hurt real bad when he and Duval tried to protect the Sunny from different threats so he went to recover at Fishman Island" he explains much to the shock of everyone.

"He's okay guys he recovered but there's more, that all happened six months after we were separated but one year later the Marines tried to capture the Sunny but it was protected by one more person... Bartholomew Kuma" Franky finished.

"WHAT!?" the crew yells in unison, only Luffy, Robin and Itachi didn't react to the news. "Myself and Luffy-kun were made aware of this by Rayleigh-sensei; however I do not know this Kuma except that he was working for the Revolutionaries and separated you for your own safety" Itachi replies and Luffy nods agreeing with him.

"I knew because I spent extended time during the two years with the Revolutionaries" Robin explains next when attention is turned to her lack of reaction. While the discussion was happening Nami noticed the ship had sunk to the correct depth and rushes to the helm.

"Guys we are about to enter the Euphotic Zone" Nami says as she slightly changes the direction of the ship. While this was happening Brook who had been watching the fish while tuning his instrument notices something following them.

"Luffy-san there's a ship behind us!" Brook yells as the crew rush the rear of the ship to see a familiar monster pulling a ship which was double the size of the Sunny. "Hey it's that cow from Arlong Park" Zoro states as everyone remembers Mohmoo. The cow in question closes the gap between them and the Sunny but once it sees Luffy and the crew it begins to panic. The new ship's crew came into view, now while no one knew them by face Itachi and Luffy had in fact passed the pair when they were walking by the group of pirates who were being recruited by the fake Straw Hats.

The two men were 'Wet Hair' Caribou and 'Blood Splatterer' Coribou who were the newest generation of rookies who followed the tradition of being 'Supernovas' or pirates with bounties over One Hundred Million Berry. As their ship pulled level Caribou leapt across the short gap to land on the Sunny's deck unfortunately Mohmoo had locked eyes with Luffy which caused him to remember the events of Arlong Park and swim away dragging the Caribou Pirates away and leaving Caribou himself stranded and surrounded.

The Straw Hats looked at the man in front of them as his bloodthirsty grin turned into a look of abject horror as he watched his crew be pulled away by Mohmoo. Caribou cursed and turned to his captors but was knocked off his feet by a Haki covered kick from Sanji; as the Supernova tried to rise to his feet he was pinned by Zoro's Shusui.

"Who are you and why did you try to board our ship? Zoro asked as the man squirmed on the ground

"I'm just a low level member of the Caribou Pirates. We want an alliance with you!" Caribou yelled hoping they believed him. Itachi looked at Luffy who responded with a nod, with his unspoken question answered Itachi strode to Caribou and kneeled looking into his eyes.

"Genjutsu: Sharingan" Itachi whispered as his eyes peered straight into Caribou's and after around twenty seconds his eyes rolled into his head and he passed out, Itachi stood up and sighed before turning and looking towards Luffy.

"Luffy-kun, he is 'Wet Hair' Caribou and the joint captain of the Caribou Pirates, he planned to ally with you and then kill everybody on board once he had gained your trust" Itachi said which caused a collective gasp and sigh from Zoro and Sanji, Luffy on the other hand grit his teeth as he hated people who would use such cowardly methods instead of just fighting.

"Itachi wake him up I'm gonna kick his ass!" Luffy yelled as Itachi sighed and did as Luffy requested. The Genjutsu dropped and Caribou shot up like he had been scalded but before he could get his bearing he was pulled by his shirt.

As the Genjutsu dropped Luffy stretched his arm and yanked Caribou towards him before pummelling him into the deck with a Haki imbued punch which was reminiscent of what he did to 'Beast Tamer' Mohji early in his adventure.

"That's for trying to kill my crew you bastard" Luffy mutters as he leaves the prone body of Caribou twitching on the ground; while Luffy walked away Franky tied him up and propped him near the stairs so he could watch him and make sure he didn't have any tricks up his sleeve when he awoke.

While this had gone on the ship had made its way to the current which would take them into the Deep Ocean and closer to Fishman Island; Sanji who had been flirting aimlessly with Nami began to frown and rushed to the side of the ship. Now while Luffy may have his Conquerors Haki and Zoro might be able to make more use of Armament Haki with his swords, Sanji was a master of Observation which he had honed during his two years in hell (A.K.A Okama Island); so when he could sense a foreboding presence beneath them in the Ocean he trusted his instincts and decided to warn the crew.

"Guys I don't want to be the bearer of more bad news but something big is lurking beneath the ship" Sanji yells as he continues to watch the ocean below. This announcement naturally has two effects: the first is that Usopp, Chopper, Brook and Nami begin to panic and second Luffy begins to get excited over seeing something cool.

Fortunately or unfortunately depending on your perspective the Caribou Pirates finally reappeared and began closing the gap between the Sunny and their ship, Mohmoo had calmed down and was charging towards them and everything seemed to be going to plan for Coribou and their crew but their rescue attempt was foiled when Luffy decided to lock eyes with Mohmoo and released a small but precise blast of Conquerors Haki directly at the poor creature. Now while no one on either ship noticed the blast of Haki since it was so direct and precise Mohmoo took the brunt of it and his resolve was shattered and swam straight past the Sunny and into the Downward Current.

With the Caribou Pirates

On the deck of the ship the crew were livid with Mohmoo who seemed to still be trying to carry them further down into the ocean. Angry yells and cursing were rising up amongst the crew and the loudest of all was Coribou who was Caribou's brother and the joint captain.

"Why does it keep doing that?" Coribou screamed in his stupid sounding drawl and began kicking and screaming like a petulant child; unfortunately due to their attention being on the captain they failed to notice as an enormous tentacle emerged from the murky waters surrounding the ship and began to slowly approach the ship. While this was happening two more tentacles emerged and began surrounding the crew who were somehow still oblivious to the peril they were in, this didn't last long however as the tentacles struck with astounding speed and accuracy, the coating surrounding the ship was burst and crew members were grabbed and pulled away into the depths.

Slowly as water pressure began cracking the hull of the wooden ship more and more people were dragged to their doom by the still unseen beast. Coribou despite not being the sharpest knife in the draw actually had the good idea to hide out of sight; sadly like the others he was eventually pulled out from his spot, however he did manage to cut the tentacle open with a large blade which prompted a bellow from the depths. The was followed by a gigantic octopus darting straight at Coribou and biting his legs which severed them and left a large mist of blood which stood out against the blue of the ocean. As the creature devoured the rest of Coribou its tentacle erupted into black flames which made it thrash in pain scattering debris around the water, the flames continued to burn as it tore off its tentacle and searched around for the source.

As its blue blood mixed with the faint traces of Coribou's; the creature spotted a slightly smaller ship a few hundred metres above its position and with unbridled rage it began swimming towards it.

On the Sunny

Itachi wiped the blood which was flowing out the corner of his right eye; turning to look at the crew he saw looks of both horror at the slaughter they witnessed and amazement at Itachi's power, quickly waving off Chopper who rushed to him after seeing the blood streaming down his face Itachi speaks directly to Luffy.

"The creatures advancing on us, Luffy-kun should I reuse Amaterasu or do you and the others wish to deal with it?" Itachi asks quickly as the creature was closing the distance rapidly.

Luffy responds by walking to the edge and waiting, he wasn't waiting long as the creature shoots past the ship and unfurls itself to its full size which dwarfs the Sunny. Nami, Usopp and Chopper scream in terror hugging one another as the others get into their respective battle stances. Robin looks in shock as she yells out.

"Luffy be careful! That thing is a Kraken!"

Acknowledging Robin's warning, Luffy locks eyes with the creature and after a short stare down cocks his fist backwards and places the thumb of his free hand in his mouth.

"Gear Third" Luffy yelled as his arm expanded until his fist was as big as the creatures head which then became black as Haki covered it completely

"GUM-GUM: ELEPHANT GUN!" Luffy yells as he lets his fist fly which connects with the Krakens head and knocks it back however due to Luffy's arm entering sea water it immediately loses a large portion of strength; this allows the Kraken to remain conscious and once it shook off the blow it sent one of its tentacles straight at the Sunny. As Luffy tried to prepare himself but fails due to his arm still being soaked in sea water Itachi prepared to intercept however he stopped once Zoro began walking towards the approaching tentacle and in a flash the tentacle split into six parts and Zoro simply shook the blood off the blade before sheathing it. No one on the ship save for Luffy, Itachi and Sanji had even seen him draw his blade yet alone perform the move which split the tentacle like a hot knife through butter.

The Kraken now in complete agony and two tentacles down was about to attack again but saw a figure dashing through the ocean towards it. Sanji had leapt off the deck into the ocean and began bouncing through the ocean at a pace similar to him on land, as soon as he reached the Kraken his leg began to literally burn with white hot flames.

"Diable Jambe" Sanji says as his foot strikes down onto the Krakens head searing its flesh and knocking it into the path of Luffy's approaching attack.

"GUM-GUM: ELEPHANT GUN" Luffy yells as his fist makes contact with the weakened Kraken which knocks it unconscious and throws it back out of sight. Nami who had been waiting at the helm for the Kraken to be defeated wastes no time in steering the ship into the downward current and back on track to Fishman Island.

The temperature drops rapidly and all the Straw Hats save for Chopper and so while everyone goes to get their coats Luffy and Itachi simply wait it out as Luffy doesn't realise its cold and isn't bothered by it and Itachi decides to use an old ANBU trick to warm himself up. By covering his body in a thin layer of Chakra he insulates his body heat instead of it being released into the atmosphere.

The Sunny finally halts its descent and begins to travel in a straight line along what was presumed to be a deep sea current. After a short while a light appears in the distance which prompts questions as whether or not it's Fishman Island so Franky activates his own lights in his chest and sends out some form of Morse code. Itachi slowly began to get annoyed when a giant angler fish appears along with a Sea Giant which at this point didn't even faze Itachi as his Sharingan activates and spins into his Eternal Mangekyo Sharingan.

The giant and the fish that were blocking the Sunny from progressing were beginning to grate on Itachi's nerves, as he wanted a quiet journey and an opportunity to relax and get to know the crew but it had been one issue after another and frankly he had had enough so when singing filled the filled his ears as the fabled 'Flying Dutchman' Came into view Itachi decided enough was enough.

"Susano'o" Itachi said as his orange ethereal ribcage surrounded him. Striding towards the edge of the ship, the rib cage forms an arm which in turn forms an ethereal sword.

With a flick of his wrist the ethereal blade splits the giant angler fish in half and before anyone could react, Itachi's Susano'o formed a second arm and grabbed the Sea Giant and pulled him down to look Itachi in the eye.

"Genjutsu: Sharingan" Itachi mutters as the Giants eyes become glazed and unfocused. "Now Giant-san you will grab the Flying Dutchman and drag it away from us so we can continue our journey in peace. Understood?" Itachi says loudly with authority in his tone.

The Giant nodded his massive head and grabbed hold of the ships ropes and began to pull it away slowly much to the ire of the captain who screamed profanity at the giant. As soon as they were out of sight Itachi deactivated his Sharingan and sat down on the deck, looking up he notices the astounded looks from everyone including Luffy.

"Why are you all staring at me? I simply sped up our journey as I am sick of all of the delays, from here until Fishman Island I will deal with all threats in a similar manner" Itachi states as he folds his arms and closes his eyes.

The crew while still stunned begin to continue with their tasks or talk amongst themselves about what just occurred.

"Remind me not to annoy Itachi" Usopp says to Brook as the Musician tunes his guitar and lets out a cheery laugh; "Itachi-san sure has an effective way of dealing with threats, it does my heart good knowing he's on our side... oh wait I don't have a heart Yohohohoho"

Zoro who had an idea that Itachi was hiding some serious power however he didn't expect something that effective. In the Kitchen Sanji had the exact same thoughts and wondered if Luffy was as strong as or stronger than their new member. On the opposite side of the Sunny Nami and Robin were having a similar discussion.

"Itachi may have a point, if we travelled more directly and dealt with threats more effectively we would spend less time between islands and would probably save money on supplies" Nami sighed as she pondered on all the money she could of saved.

Robin lets out a small chuckle as she steals a glance at the Uchiha who had been approached by a concerned looking Chopper.

With Itachi

"Uhm...Itachi-san?"

Itachi's eyes opened to the sound of a small voice, looking around he spots Chopper looking at him with a small medkit.

"Yes Doctor-san how can I help?" Itachi asked despite guessing the answer. Chopper begins to set the medkit down and unpack specific items such as a torch and cotton buds.

"Itachi, can I check on your eyes? They were bleeding earlier and I would be unable to rest unless I know you are in good health" Chopper says which makes Itachi smile and activate his Eternal Mangekyo Sharingan

"Doctor-san, you don't need to worry my eyes are the source of some of my abilities and while it may seem like they are damaged it is simply a temporary side effect of Amaterasu. However if it makes you feel better you can examine my eyes" Itachi says which makes Chopper smile and begin his examination.

"Itachi, can I see you use Amaterasu so I can see its effects on your eye?" Chopper asks which Itachi complies, closing his eye for a moment before reopening it and lighting a small portion of the deck on fire before immediately dousing it.

Chopper who had been closely examining his eye gasps; "Itachi your eye builds up a large amount of pressure which causes blood vessels in your eye to rupture and then after a few seconds they heal completely. I believe you focusing all the power into one spot causes the blood vessels to burst" Chopper explains

"So you're saying I should spread the power throughout my Sharingan rather than focus it?" Itachi summarises before beginning to try Chopper's idea.

"Amaterasu" Itachi calls as he releases the power instantly without any charge up and to his surprise the entire general area ignites in a black flame that while still as hot was weaker due to it being more widespread with less Chakra powering it. 'This is interesting, while not as devastating as it is when its charged, its more widespread and could help me should I find myself surrounded' Itachi thought as he pats Chopper on his head

"Thank you Doctor-kun, you have just given me a new technique" Itachi says with a sincere smile which Chopper returns tenfold

"Wow, really?!" Chopper yells with pride as he does his happy dance. Itachi was about to reply when he was interrupted by Nami yelling that Fishman Island was in view; climbing to his feet Itachi along with Chopper walk over to the group to see a gigantic island covered in a thick bubble.

As the Sunny gets closer to the Island It's intercepted by a swarm of Sea Kings which are ridden by Fish men. Completely ignoring their rant Itachi begins to activate his Sharingan to deal with them but a hand stops him.

Looking around he sees Nami who shakes her head and whispers, 'the resin is close to breaking we can't take the risk, Franky is preparing a coup de burst which will shoot us into the island'. Understanding Nami Itachi nods and simply waits until he feels the ship launch itself forward which forces him and the others to the deck because the resin shrinks and constricts everyone . As the Sunny passes through the bubble the resin is torn off by the bubble. Before they can breathe a sigh of relief the Sunny passes through a second bubble which submerges everybody in water. The Sunny is swept into a current which throws everyone in different directions. Brook and Robin get pulled by the force of the current and are quickly swept away much to the horror of the crew; however they can't dwell as the Sunny spins in which snatches Franky and Zoro. The only bright side is Zoro and Franky are swept in the same direction as Robin and Brook which meant they can try to stop them from drowning.

Itachi quickly sends Chakra to his feet which help him keep his balance; it doesn't help him when Nami crashes into him, knocking the breath out of his lungs and dislodging him from the floor. As they are swept away he quickly grabs Nami's hand and pulls her into a hug to prevent them from separating, as an afterthought he surrounds them with his Susano'o to protect them as the current sweeps the two away from the ship. After a few minutes they are thrown out of the current and once they stopped spinning Itachi spots light shining through the water. Forcing his legs to move he began to kick and force his way upwards towards the light.

Itachi breaks through the surface of the water with Nami, as he looks around he spots the shore a short distance away which Itachi swims towards slowly. Trying to keep conscious and make sure Nami's head stays above the water was difficult and when his body is begging for rest makes it ten times worse. Upon landing on the shore Itachi pulls Nami to safety before turning and vomiting salt water before collapsing to the ground, the last thing Itachi sees before darkness overtakes him is Nami cough up water and suck in a deep breath.