Diablo is the Best Babysitter.

(Hanae, Ryoga, and Shizue aren't on this chap since they are a bit too young.)

"Remember to Listen to Uncle Diablo, Ok?" Rimuru told them as he finished preparing the kids for their trip.

"Ok!" A group of kids answered back in excitement.

Diablo could only look in with pride as he stared at the tiny versions of his lord. And he couldn't wait to see what sort of future awaits them.

Would they become interdimensional conquerors? Would they one day become as amazing as his lord?

He had infinite guesses, but in the end, he could only wait to see what the future brought.

As he led the group of kids to the world that Rimuru had chosen they encountered a blue robotic cat with a determined expression. And just as the cat was about to introduce itself Terra yelled out.

"Blat! Your name is Blat! You are a BLue cAT so you are Blat!" She said in excitement as she pointed at the robot.

Suddenly the blue cat felt a jolt of energy as if he was suddenly at full battery. His sensors were going off with a sudden barrage of reports. But before he could process them another kid screamed.

"Terra! You said you weren't going to name without asking us for names first. Now it's stuck as Blat. It could have been named something cooler like Cybercat!" Hawthorn exclaimed as he began to pinch the cheeks of his sister.

The kids began to argue among themselves before Blat spoke up.

"My Name Is Bla- I mean, Doraemon!" He yelled out in frustration.

"NO, your name is Blat!" Terra said while pointing at him once again.

Doraemon could only sigh as he thought.

'I just have to entertain them for some time and then that strange person will fix my ears. I will just deal with being Blat for today.'

"Alright, I am Blat, And I will show you kids some really cool stuff… Where did the other ones go?" Doraemon asked as he saw only the blue-haired girl who had named him Blat, a blue-haired girl with long ears, and the kid who wanted to call him Cybercat were left.

"Ah, they wanted to explore so they just left." Luna said as she pointed to the distance.

Doraemon gave a side glance at the black-haired butler who only answered with a smile.

"They will be fine, I am watching over them right now. Now continue with your job."

"What sort of stuff can you do Blat?" Asked Luna as she looked at the robotic cat up and down.

Finally having a chance to show off to the kids Doraemon pointed at the pouch in his stomach.

"I have this special pouch that can store so many things you wouldn't believe it. It is called the 4D Pocket!" Doraemon began to pull different things out of the pocket to show the kids.

"Woah! You got a deus ex machina pocket!" Luna exclaimed as she began thinking of all the possibilities.

"Can I disassemble you to see how you work?" Luna asked as she began approaching Doraemon with a dangerous look.

"Luna, you shouldn't hurt Blat. Dad says it is not nice to hurt things." Terra exclaimed as she stopped her sister in her tracks.

"But he is supposed to be a robot cat. I am sure he won't even feel it." Luna argued back.

— — —

"Homura, I have decided! I will become the emperor of this world!" Fafnir said as he pointed to the sky.

"Dad told us to be nice on our-" Homura tried to scold him before another voice interrupted her.

"No! I will become the Empress, Mom will think I am super cool if I do that. Uncle Guy told me that if I become the ruler of a world he will give me a super cool gift." Aster yelled as a pair of wings emerged on her back.

"Wait. Guy told me that he was going to teach me a super-secret technique that will make me super strong. What is this about a super cool gift?" Fafnir asked

"Veldora told me that he would give me his super cool sword if I showed him something cool… Since I don't spend too much time with Guy he didn't offer me anything, but do you think he would teach me something cool if I ruled over a world?" Takeshi said as he began to think deeply about what sort of things he could get.

"DAD SAID TO BE GOOD WHILE WE WERE VISITING!" Homura yelled out to make her siblings quiet down.

"As your big sis, I cannot let you guys make a mess of the place!" She added.

"But… what if we fix up the place?" Alder asked.

"Eh?"

"You know, like if we become rulers we can make sure that no one gets hungry. Or we can make it so that people are happier like our parents did…. Wouldn't that make them proud of us instead?" Alder said with a thoughtful expression.

"Sibling huddle!" Homura said out loud. And after the huddle was formed she said.

"Ok, we are doing this. We have a few hours in this world, so we need to make this as efficient as possible. You all know what that means… right?" Homura said while thinking.

'Mom and dad will definitely give me lots of head pats and hugs after they see how well I did.'

"We need Terra." Aster said with a determined expression.

And just as those words left her mouth a person suddenly appeared in the middle of their huddle.

"You called?" The crimson-eyed girl asked with a happy smile on her face.

And as she was filled in on the plan her expression turned serious.

"Leave it to me." Terra said as hundreds of plans continuously popped on her head.

And then her expression turned slightly awkward as she said.

"Well… with the time we have… I have a plan…"

Noticing her expression, Alder asked.

"Is something wrong?"

"Well… it has a pretty good chance of going badly… but… if we really want to impress our parents we have to hope we are lucky…. You know what. I have a good feeling about the plan!"

"Oh… You jinxed it… we are in trouble." Aster said with concern.

"..."

"..."

"Sweet Honey Ice Tea…" Terra cursed before telling them her plan.

— — —

As he watched Luna chasing a scared blue cat with some tools on her hands and Hawthorne encouraging her, Diablo let out a smile.

He was at the same time watching over the rest of the kids. And of course, he was bursting with pride. It all finally made sense in his mind.

"Sasuga Rimuru-Sama. To think that you would already be sending your children on training missions to learn how to capture worlds."

The chase of the newly renamed Blat suddenly stopped as alarms began to blare all across the city. And suddenly on all televisions across the world, a group of kids began to talk.

"Hey everyone, we would like to announce that we are the new rulers of this world. Don't worry about the alarms. Apparently, the governments of this world misunderstood us and launched some nukes. So that's what's happening right now." Homura said while reading off a script in her hands.

"There appear to be around 9,000 nukes on the air right now. But after we beat up your leaders we have forcefully taken over…. Hey, isn't this a bit too direct, Terra? Aren't nukes supposed to be scary to regular people? I mean that's why Aster is mini-nuke and Milim is Little nuke." Homura, while still on a live broadcast to the world, got distracted.

Fafnir, taking her distraction as a chance, snatched the script off from her hands and continued.

"Now that we are your new rulers we declare no more wars…. Ignore the nukes in the air, they don't count… And also free food for everyone…. And houses… And…. Aster, you didn't finish the script! What am I supposed to say?" Takeshi said while waving a piece of paper around.

"I didn't have time, ok? I got distracted with all of the teleporting around. Do you know how hard it is to write while teleporting? Plus that one dude called us monsters and tried to shoot us with the weird loud thing. Plus we were in a rush. If we didn't start the video now we would run out of time before going home."

"Sibling huddle!" Homura called out and all of them huddled in an instant before muttering to themselves for a few seconds. All while still live streaming everything.

After a few seconds, Homura stepped to the front of the group and said.

"Long story short we are your new leaders. And we declare this as a new territory of the Tempest Empire… So as a royal command we order you all to be happy!" Homura said with a bright smile.

Diablo could only let out a loud laugh as he listened to what was happening.

"Kufufufufufufufufufu. Rimuru-sama, your kids are truly special. However, they are still really inexperienced. I should probably deal with the things in the sky before they destroy this planet. I will also have to calm down the people before they make a mess.

I should probably start teaching them how to properly conquer a world. Rimuru-sama will surely be impressed when he sees their future conquests."

And just like that, he disappeared leaving a stunned Luna, Hawthorne, and Doraemon/Blat in shock.

But it was all for different reasons.

"They didn't invite us!" Hawthorne said as he tried to remember how to use space magic to reach his siblings.

"Here, I made a bracelet that can teleport us to Fafnir. We can get to them this way. I was going to use it to teleport a bunch of water on him while he slept but this is more important.

Blat, I will be back. And I will figure out how you work so that I can create a deus ex machina prank paradise."

Crushing a small orb on her bracelet they disappeared only to crash against their siblings that were still on everyone's screens.

— — —

The world had gone into pure panic.

Not only were alarms blaring everywhere that nuclear missiles were heading to them but they had gotten messages that nuclear war had started. And that with how many nukes had been shot that everyone would die.

Add to the fact that a group of kids had suddenly appeared on every screen they had claiming to be the new rulers of the world. A crazy statement that only added to the mass confusion and fear that everyone felt.

Some people were ready to go crazy in their final moments and begin causing mayhem. Doing all of the things they had held back from doing. But suddenly everyone was assaulted with drowsiness as they all began to calm down and find a spot on the ground to sleep.

The world went eerily quiet as the entire population went to sleep. Making sure that no one got injured from the sleep, Diablo nodded as he checked the stack of nukes in his storage.

Diablo had a delighted smile as he continued to listen to the kids arguing about the new laws they were making before his expression turned dark with anger.

—-

Doraemon, who was watching all of this with shock, came to a realization.

'I have doomed this world by accepting that offer… wait no. I can still fix this using my deus ex machina- I mean 4D pocket.'

Doraemon pulled out a "Nuke disabler" from his pocket before tapping it.

However, the screen told him that no nukes were detected.

Sighing in relief he pulled out a second device. The dictator switch, also known as the delete key.

A dangerous gadget capable of deleting the existence of people. Capable of erasing any trace that a person ever existed. (This is canon btw)

Doraemon was extremely hesitant to ever use it. But he knew that the lives of everyone in this world depended on it.

He had met the kids for only a few hours, but his scans could already tell him that they were far more powerful than anything he could handle. And if they truly were capable of bringing the world to war this would mean that they were far too dangerous.

He reached down to press the button when he felt a hand grab him, stopping him.

"Kufufufufufu. Could it be that Blat is thinking of hurting Rimuru-sama's Children?"

Doraemon felt true fear as he felt the button in his hands turn to dust.

"That is one of the worst crimes you could commit. And I should punish you accordingly…." Diablo said as his smile grew wider and wider before it suddenly disappeared.

"You are lucky. It is time for the children to return home. Since my lord ordered me to fix your ears before returning I will do just so." Diablo said as he repaired Doraemon's broken ears in a moment.

But before Doraemon could rejoice to finally be a proper cat once more he felt something he could never forget. Followed by the sound that haunted his "Dreams"

*Squeak*

Diablo was slightly annoyed he wouldn't be able to properly punish this sinner. But at the very least he could add onto his trauma. Along with the ears he had made appear on Doraemon's head he made a couple of mice to begin chewing on them.

And in just a few hours the newly repaired ears would be eaten once again.

Teleporting to the children he congratulated them for their great job and promised to train them to become the best conquerors to ever exist before leading them home.

And once they were back home they all swarmed their parents as they began to retell how they had "saved" the world.

~A/N~

Honestly, this was pretty fun to write. Next time I will just focus on two or three kids to make it better.

Jeanpierregerardo has been asking for a chap where they go back in time so I have some plans for that in the future. If you have any ideas to add to that one let me know.

And also, let me know of any other worlds that would be fun to visit.

Hopefully, you enjoyed the chap, and I will see ya next time with more Rimuru and Ciel visiting another world.