The instant I said that, Naruto's artificial right arm disintegrates into nothing and his original arm starts growing back. This process didn't even take 5 whole seconds...
Naruto "H-how did you do this? Just who are you really?"
At this time, Naruto was in complete shock due to what was happening in front of him. This man that suddenly appeared in his office just did what was considered impossible... He was still trying to wrap his head around what was happening today.
Cain "You really are an idiot in everything but fighting huh. I just restored your arm to its original state, before your fight with Sasuke and all that. I also adapted it to your current body and power of course because if not it'd be kinda weird..."
Naruto 'How did he do this? I didn't even sense him using any Chakra and he didn't make any hand seals... Not even Gramps Rikudou Sennin could so something like this.'
Cain 'Time to use my mastered Bullshit-no-jutsu to make up my origins in this universe...'
Cain "To answer your second question, I'm not originally from this world... I come from a world far way, where my whole planet was one gigantic clan, The Smith's. Everyone was peaceful and caring to each other, and we were masters of the art of manipulating energies, not just Chakra or natural energy, but a wide array of energies that exist in the whole universe. But then one day, came the Otsutsukis... They wiped my whole clan and destroyed my planet due to the fact that we were threatening their power in the universe. Their entire clan came to murder and destroy my home and my people, even the Patriarch came. Against that, we stood no chance. Thankfully, I was away on a mission to gain more power and knowledge across the universe to help my father that was sick with an unknown desease. When I came back to my planet, I saw nothing... Only floating pieces of what I once called my home, and at that moment, a fire lit itself within me and my thirst for revenge began. For years I've been traveling the universe gaining more power and information with the hope that one day I'll be able to destroy the people that massacred my clan....
"And the magical day arrived. Once I was sure that my power was enough to be able to wipe the Otsutsukis off the map forever, I began my revenge against them. I erased them out of existence and trapped them in a state between life and death in the void for eternity... So yeah, that's my story."
Cain 'Damn I'm impressed with myself, how I even came up with this in an instant is beyond me... Rhea create a skill called 'Erase' that let's me erase anything that exists, has existed and will exist off existence. If used with my full power I can erase things across all realities, timelines and multiverses.
{Ability created Cain}
Cain 'Perfect, now Rhea erase the Otsutsukis from this universe please. Even though what I said was complete bull, I can't just say that and the next day an Otsutsuki comes attacking this world so yeah, gotta have some truth in my lies.'
{The Otsutsukis have been erased}
Cain 'Thank you Rhea.'
Naruto "You talked so fast that I pratically didn't have time to understand anything but let me see if I got this straight. You are not from this world, the Otsutsukis erased your clan and you gained enough power to destroy them and you did... wait, did you just say that there are other energies in the universe aside from Chakra and natural energy?"
Cain "Yes, that's basically it... And of course there are other energies that exist out there, did you think that in the whole universe there would only be Chakra? Do you even know how massive the universe is? I can teach you how to use these other energies with one condition..."
Naruto 'I still don't trust him, but what he said is surely interesting... If I learn how to channel this energy it would change the whole world. I could teach people that there are other types of power out there. But wait a second, did he just say that he wiped the Otsutsukis? Does his power have any limits??'
Naruto "What is your condition?"
Cain "It's simple really, I just want to eat some Ichiraku Ramen, I've heard they are the best there is."
Naruto 'WHAT? He is really going to give another type of energy for some RAMEN? Actually it's not just ramen, it's Ichiraku Ramen so I think it's a fair trade... maybe I'm actually on the losing side of this trade, that ramen is too special.'
Naruto "Let's go then, but just so you know, I still don't trust you just because of what you said."
Cain "That's fine with me, I know trust isn't something you gain from night to day..."
After they finished their brief conversation, Naruto created a clone to stay in the Hokage's office filling the paperwork and they left for the famous Ichiraku Ramen.
Arriving at the iconic but now modern ramen stand...
??? "Ohh Lord Seventh! What a pleasant surprise it is having you come here!"
Naruto "Sorry Ayame, I haven't been able to come here a lot... today I bought someone with me that wanted to eat some of your ramen..."
Ayame "It's quite alright, Lord Seventh. You have your Hokage duties afterall... Now may I ask who this is Lord Seventh?"
Cain "Hello there! I'm Cain!"
Ayame 'N-nani? General Kenobi??' lol jk
Ayame "Welcome to Ichiraku Ramen Cain! What would you both like to eat?"
After hearing that, Naruto reached into his back pocket and took out a white paper with an orange outline. The paper had some japanese writings and a funny face imitating someone with a satisfied expression.
Naruto "Ayame, is my Naruto Gift certificate still good? Hehe"
Cain 'I should have expected this idiot to have something like this...'
Ayame "Of course! We'd be honored to serve the both of you!"
Naruto "Perfect! Then I'd like a Special Ramen please, and you Cain?"
Cain "Same as him, please!"
After hearing their order, Ayame went to the back to prepare their food... Meanwhile Naruto was trying to get more information from Cain."
Naruto "So Cain, what is this other energy that you will show me?"
Cain 'Shit what's the name? Meh I'll just use that one now...'
Cain "This energy is called Ki. It's the life force that exists inside every living being. Using it is quite easy actually, you just need to know what you are looking for. Just so you know, Gai's 8 gates technique uses a little bit of Ki unconsciously."
Naruto "Can you show me you using it?"
Cain hearing that, nodded his head and created a tiny Ki Blast the size of his hand, Naruto was, of course, impressed by that action because he couldn't sense any Chakra inside that ball."
Naruto 'So he wasn't lying, there actually are other types of energy out there...'
Cain "Now try sensing the energy this ball is emiting, get the feel of Ki and remember it, after we eat here I'll teach you how to use Ki properly..."
CHAPTER 4 END
(A/N: Hello everyone! Hope you are all having a great day. I wanted to ask a question to everyone and that question is, would you like for Cain to bring people along with him on his adventures or just leave him forever alone? I could make him teach Naruto something that can idk, split his consciousness and leave another part of him here so he can join Cain on another worlds, of course it wouldn't be a simple clone but actually him... let me know! Thanks for all the support, God bless you all!)