I leaned back as I watched him take a sip from a calming cup of Jasmine tea his shoulders relaxed the tension draining of him.

"Good now that you have calmed down, I can start by letting you know that I won't be erasing your memories."

He looked confused.

"Don't ask me why, it's not something I can explain to you anyway. However, you must not tell divulge the existence of magic to those who do not know. Understood?"

He nodded hurriedly.

"Good," I said as I relaxed now that that part was over.

"Why is magic kept hidden?"

"Why you ask?" I hummed. How do I explain this to a kid in a way that he can understand?

"Right, do you know the story of The Golden Goose?" He nodded. "Now imagine that the news about the Golden goose spreads. Then none would buy the Golden eggs anymore!"

His eye widened.

"So, if I tell people about magic then it stops working?"

"Hmm not exactly it just gets weaker, every new person who knows about it makes it weaker and weaker. Eventually, it will disappear. But the one thing you must know is that if it starts spreading there are a group of people called the executors. They will kill each and every normal person who knows the existence of magic. So, if you plan on telling someone make sure it's someone you trust to keep quiet or else the executors will come after you."

And he was scared again.

"As long as you make sure that the knowledge of magic doesn't go to someone who can't keep their mouths shut you should be fine so stop being so scared alright?"

It took a while to calm him down but once he was calm, he asked the question I had hoped he wouldn't ask.

"Can you teach me magic?"

"No."

"Why not? I want to learn magic."

"First of all, human magic is called mage-craft and second I can't teach you because I am not a human."

His eyes widened. "What?"

"I'm, not a human kid, you can't use the magic that I use kid."

"Oh." He looked down dejected as if he was a kicked puppy but he regained his curiosity a few seconds later. "So, if you're not a human, then what are you?"

"I'm a Devil," I said grinning.

"No way! You're too nice to be a Devil."

"Yes, way kid."

"Hey, you're a kid too."

"No, I'm not, just because I'm short doesn't mean I'm a kid."

"You still can't be a Devil though."

"Oh really?" I raised my eyebrows in a challenge.

"Really!"

"Then what are these?" I unfurled my devil wings as they manifested behind me and I gave them a light flap.

He didn't look convinced and went behind me as if he was searching for some kind of mechanism that kept my wings attached to my back.

"It's real, kid."

I felt his fingers on my wings as he traced it.

"Kid?"

"It's real?"

"Yes, it's real, kid."

"So, you're a real Devil?"

"I am a Devil yes and also a Princess, I guess? Since technically my brother is the King of hell."

"Wait, you're a princess?" His eyes widened as he sat back in front of me.

"Yep."

"Awesome! So, you live in a Castle?"

"Yep." I took out a few family photos I kept from my pocket dimension. "This here's my mom, this is my Dad, and this is my Brother."

"So that's the Maou?'

"Yep."

"He doesn't look so bad. He looks really nice."

"Yeah, he's pretty nice." I smiled reminiscing my time with him.

"And this is me and my best friend in the great library."

"She's pretty!"

"Isn't she?"

And so, a new bond of friendship was forged between a Human, and a Devil Princess? Devil-Human-Princess? Hmmm. Need to find a name for that.

Dropping Shirou off to his home via [GATE] and then I went back, I think Shirone has been waiting for a while, it's time to continue training. It was afternoon and I wanted to get some training done before midnight.

Shirone was in a pure white one-piece swimsuit and some sandals which I had given her to wear for today's training. I had removed my Ruby costume and released the transformation because maintaining a transformation takes a small amount of magical energy and I wanted every bit of magical energy I had for training.

I led her to a nearby lake for our next training.

"Now that you've mastered the tree-climbing exercise, today you are going to be doing the next step in learning how to get a good amount of control over your Chakra. As you can see this lake is pretty calm and shallow but it's about 30 meters across to the other side. Your objective is to walk on top of the water and crossover to the other side and back without sinking more up to your feet, in other words, if you sink more than the sandals you are out."

Shirone stared at me with the "are you dumb?" look...

"Do you remember the Tree Climbing exercise?"

She nodded affirmatively.

"Good now remember when you put too much Chakra it caused you to be blasted off the tree?"

Shirone blushed at the reminder in embarrassment.

"Don't be embarrassed," I reassured her. "That is something you can use in the future if you need an extra boost. What you need to do now is to put out just enough Chakra so that the water pushes against you just enough to keep you on the water instead of pushing you off or sinking."

She nodded and she stepped forward and placed one foot onto the water. She tested her footing before she took a second step. She took a while pressing against the water before she felt confident enough to take a second step. This time she sunk up to her ankles but quickly adjusted and managed to raise herself back to the top. However, it didn't last long as she sank a bit again.

"Oh, by the way, you need to constantly adjust your flow of Chakra unlike the constant amount in the tree walking exercise, the uneven waves of the water means that you have to constantly feel the waves in the water with your Chakra and adjust accordingly."

She gave me a glare for not telling her earlier.

"Also, will be doing this in the ocean once you can do it here," I said with a mischievous grin. She gave me a glare that promised retribution for this and then she turned away continuing her efforts not to sink.

I shook my head as I turned around and moved away about a few meters from the waterline.

What was Mana? I knew it was the energy that I use for my magic. It was also the energy that was produced by the world. What kind of energy was it though? I raised my right hand in front of me and began to form a ball of pure Mana, on top.

I couldn't see anything. I knew it was there because I could feel it but It was completely colourless?

What about the red colour that I had before?

The next instant a glowing red orb formed on my hand. No, it would be more accurate to say that the colourless ball of mana turned red.

Does this mean that the colour of the Mana was following my unconscious expectations?

Hmmmm, if it can glow red light then what about releasing the light in a single direction?

With but a thought the ball was once again colourless. but there was a large red circle illuminated on the ground. I had directed the ball of Mana to only give of light downwards.

It also behaves like light completely weightless.

I willed it to turn into a ball of iron and it turned into a ball of iron.

Jesus fuck Magic was the ultimate middle finger to the laws of conservation of energy.

Then I turned it into Gold.

A shining ball of Gold...

I think I'm starting to understand.

The Magic that devils use comes from imagination, but it can also be phrased in a very different way. We Devils were literally made of Pure Magic, so it was no surprise. We were basically like Biju. A consciousness of extremely dense mana which was given shape by my parents. I didn't know any more details about it as I'm not a devil doctor or someone specialized in it. Unlike those like Koneko who were reincarnated there had a Physical body even if they gained some of the attributes of a Devil, they would never gain this power.

The power to bend reality to your will.

Bend reality...

An Idea popped into my head and I didn't waste any time trying it out.

"Fus...RO DAH!"

The sky cracked, a roar of a dragon washed over the horizon, reality itself was bent and the poor tree in front was completely uprooted and was send flying crashing into other trees.

A grin began to form. This was going to be fun.

"MWUAHAHAHA!"

Shirone was frustrated.

The water would not stay still and her chakra was slow to respond. It was certainly much faster than before she had done the tree-climbing exercise. Back then it was like thick glue, it was much more difficult to move it, and so she used it for enhancing her strength and speed, and her senses. In fact, no one in the Nekoshou clan knew that chakra could be used this way, most of them focused on magic, Touki, or youjutsu. She was perhaps the first to Chakra like this, in perhaps a Millennium.

Her Chakra was a just a bit too slow so she kept sinking and climbing back up just barely able to keep up with the waves. It was a slow process but she had made it to the center of the lake without sinking.

Then "Fus...RO DAH!" her sensitive ears were assaulted and, in her surprise, she lost complete control of her chakra and fell into the lake. completely drenching herself.

If she was not wearing a swimsuit it would have been really bad.

Still, what was that?

Shirone began to swim to the shore and once she had made it, she found her King laughing evilly.

"MWUAHAHAHAHAHA!"

"..."

"Oh, hey Shirone." Rias stopped turning to her, "So, did you manage to make it across?"

"Halfway."

"Oh. Well, then why don't we stop for a short break then?" With that, she pulled out a picnic basket and a towel and two glass bottles of milk that was still cold and fresh if the condensation forming on the sides of the glass of the bottles were anything to go by, from her pocket dimension spell.

Shirone wondered, how did her Sempai come up with her spells? She seemed to have a huge repertoire of spells with her yet she was still so young. When did she learn all of this? Shaking her head, she accepted the towel that was handed to her and dried herself before taking a seat on the cool grass next sempai taking one of the tuna sandwiches in the basket and biting down on it.

Tuna...

"Mhmm." her cat ears flickered and her tail swished in ecstasy.

Tuna and Mayo... with milk. Sempai was truly the best.

She leaned on her sempai as she ate in silence watching the sunset over the horizon.

Once we had finished our short picnic the sun had set and I watched Shirone continue to train well into the night I began to meditate to accelerate my Mana regeneration. I was not sure what was going to happen tonight but the best I can do is prepare for it.

It was nearly midnight when Shirone finally mastered water walking. At least of calm waters. But this should be good enough for most techniques that I plan of teaching her I wiped her dry and warmed her up with a spell to keep her from shivering from the cold as we began to walk back towards the temple...

You know it is kind of Ironic that a Devils home base is in a temple it's the last place someone would look for a devil in.

Hmmm. Looks like Kariya and Sakura are back and already asleep.

Once I put Shirone to bed and made sure she was fast asleep I transformed and changed to my Merlin disguise, spread my wings and took off into the night sky.

I wonder will happen today?

There doesn't seem to be anything happening tonight. Which kind of makes sense. In the Original timeline, Caster was kidnapping children and turning them to 'art.' Since I was summoned instead this did not happen.

I might as well get a bite to eat.

Slowly flying down into an alleyway and retracting my wings I began to walk trying to find a good place to eat...

Hmm. Eventually, I found a cozy little restaurant will a delicious smell wafting from it.

Upon entering though I saw the one person I didn't think I would see.

"Kotomine Kirei."

"Caster."

Kirei had not been corrupted yet so maybe I might be able to influence him?

I took the seat facing him and waited for the waiter to arrive.

"Is it delicious?" I asked eyeing the bowl of red hot Mapo Tofu.

I could smell the spice.

"Also, how the hell do you even eat that thing without any rice?" I said unable to hold back anymore. "Sorry, different people have different tastes I guess."

"I'm not offended, Caster."

"Good."

"..."

"..."

"You wish to speak to me?" He asked before taking another bite.

"Was it that obvious?"

"Indeed."

I let out a sigh before looking straight at him. "Kotomine Kirei." He paused sensing that I was about to say something important. Looks like before Gilgamesh corrupted him was quite well versed. "You find joy in other people's suffering."

"And what of it?"

"I think I might be able to help you." His eyes shot up, looking straight at me silently staring for a while.

"...you truly believe that..."

"Well, I can certainly try, whether you accept my advice is up to you."

"Why...why has God made me like this? I was taught to do good. To help the needy and the powerless. Yet I am unable to get any joy from it. I only feel joy in causing others suffering, yet I know it is a sin to harm the innocent without due cause."

"It's not your fault that you were born that way. There are people who are born completely blind, unable to perceive the beauty of the world God has created. There are those who are unable to speak not able to utter a single word, there are those who are born deaf, unable to hear the joyous sound of the birds chirping and the ocean waves. There are those who are unable to taste anything. So tell me Kotomine Kirei which of these favours of the Lord do you deny that was given to you?"

His eyes widened and he had stopped eating listening attentively to every word I was saying. Good, then I could get to the point.

"Yet these people do not give up, they continue trying to live their lives, and if they continue to struggle to do good then the Lord's reward shall be far greater than the one who was able to do it with ease. You might be a broken man Kotomine Kirei but the Lord has blessed you with knowledge. So that your reward may be far greater because you did the correct thing and was righteous even when you did not feel any joy or receive anything in return."

"I...I..see." His eyes turned back to his dish and he slowly began to resume eating.

"Besides. Who said that pain and suffering or causing someone discomfort had to be something that harms someone, or it should be a sin?"

"What do you mean?" His questioning gaze turned to me once more.

"For example, good medicine is quite bitter. When a parent gives the child a bitter medicine the child suffers for a short while because of how unpleasant the medicine was but it would be thanks to the medicine that the child would be cured of whatever might ail him. Then we have pain. Pain in itself is the body's warning system that lets the person know that something is wrong. If pain didn't exist then..."

"The person would not know that there is a problem." Kotomine finished.

"Indeed. and he cannot take any measures to fix the problem." I nodded giving a smile. "So if you wish to entertain yourself without doing sin, you could become a Dentist."

"A dentist?"

"Indeed taking care of once teeth is important, and a lot of people fear dentists because the tools used by them look very much like torture devices, just make sure that you are actually fixing what is wrong and not go beyond that. OR if you are raising a child you could make sure they eat a lot of vegetables, I hear children hate vegetables, yet their body requires them or perhaps if the child is quite prideful you could embarrass them by carrying them to school if it is a prideful child it would cause no end of embarrassment for them, oh and give them a hug and a kiss on the cheek in front of all the school kids while dropping them off. It would show them that you care for them but it would also cause no end of embarrassment. And if they do something wrong instead of hitting them give them something they dislike to do but is helpful like making them wash the dishes or cleaning the toilet. They will have to learn to do things like it eventually anyway. Then, of course, training them, training them will definitely cause physical pain but it will make them stronger in the end."

Kotomine was grinning right now. "Oh, interesting...tell me more..."

"Hmm, if like you could prank people, something not harmful but something that would embarrass them and that will make people laugh at them, the damage should be easily fixable though. Like hmm, say...dying someone's clothes a ridiculously bright colour like pink or Orange. Filling someone's shampoo with itching powder."

Kirei had now started taking notes from a notebook he got from somewhere, grinning all the while...this was going to be so much fun oh the ideas I'm going to pass to him.

And so the King of Pranks of the Nasuverse was born...

Somewhere in Fuyuki, Tokiomi Tohsaka, Risei Kotomine, and Rin Tohsaka all shivered simultaneously.

Kotomine Kirei was officially out of the war. Almost all of the Hassans have been killed by Rider's Noble Phantasm, but he still has a few remaining. Right now though he was trying out some of the Idea's Merlin had given him.

And it was glorious. Tokiomi's hair was bright orange, and the man himself hasn't even noticed it yet. Truly Assassin was a master of stealth.

"Tokiomi..." Risei's voice died out as his eyes widened in surprise at the bright colour of Tokiomis hair but he managed to ignore it thinking that it was something to to with the mage-craft of the magus, and continued with his business.

Tokiomi finally noticed it when Gilgamesh had arrived. When the king saw the hair of his master painted in such a ridiculous colour and for the first time since he had been summoned to this world let out a loud belly laugh.

"HAhahahahaha! Truly amusing Tokiomi, such a colour indeed suits you. Whoever did so knew that you needed some excitement in your truly bland life. HAHAHAHAHAHAHA! I praise the person who did such a thing! They would make an excellent jester in my court."

Coming from the arrogant King this was akin to getting a medal honour.

Gilgamesh seemed to know it was him from the approving look the king gave him but remained silent about his involvement.

"MY HAIR!" He screamed to the heavens.

Even his wife seemed to be struggling to hold in her laughter when she saw him and helped her husband try to wash off his bright orange hair.

Tokiomi tried washing his hair with water.

It did not wash off.

He used soap and water.

It still did not wash off.

He used shampoo.

It did not wash off.

He used rubbing Alcohol,

It still did not wash off.

He didn't dare try a magical means, it could damage his precious hair.

"I heard that Oranges and Lemons are good at cleaning," Kotomine suggested. Outwardly he was stoic as ever, but there was a slight grin on his face that could only be found if someone was looking for it.

"I suppose it can't hurt to try," Risei admitted.

Aoi giggled and Tokiomi let out a sigh.

His wife helped him juice Oranges and lemons and finally, finally, the paint began to wash off.

But for the rest of the week, Tokiomi's hair would smell like oranges and lemons.

The pranking kit that was gifted to him from Merlin was truly something he came to enjoy using with assassins stealth skills.

The founders of the Hassans would be rolling in their graves right now from the way their art of stealth was being used. But for the Hassan of the Hundred Personas, however, it was something new for her.

Her master seemed to be using her Power not just for murder but to bring smiles and laughter.

Even the arrogant King of Heroes had burst out laughing.

It was...refreshing to use her power for something other than murder...and it seemed fun...

She didn't know how much fun she would be having in the coming years...

In Ryuudou temple.

Shirone, Kariya, Sakura and I were having a hearty breakfast of Rice and curry.

"MY HAIR!"

Kariya stopped eating midway his eyes wide turning towards the sound. "Holy Hell, was that Tokiomi? Damn whoever messed with his hair must have balls of Titanium. That man guards his hair ever more zealously than his own magic."

Well, looks like Kirei didn't waste any time making use of my little present. Only time will tell whether my plan worked.