A Demon King Through The Worlds

"The overlapping of different dimensions along with the travel between worlds must have caused a temporal stagnation." Lucian analyzed.

At least that was the only explanation he could think of for the moment.

"I didn't understand your words, but I see what you mean," said Mitsuri, as she nodded.

"Hahaha, it's okay not to understand, I don't fully understand either." Lucian let out a laugh as he stroked Mitsuri's head.

Everything that involves changes in the fabrics of space and time are highly complex, even more so when talking about movements between different worlds, which are an even more complex kind of space.

"What about you? Are you all right?" asked Lucian, as he turned towards his other traveling companions.

Kokushibo and the other kizuki were completely fine, thanks to their great strength.

Mitsuri's parents were suffering from severe dizziness and nausea, but nothing too serious.

However, the children Kamado and Mitsuri's brother were the worst off, as they were the youngest and humans who had never been trained and had weak constitutions, so they were in terrible condition.

"I think this is the best choice..." Lucian then raised his left arm and made a cut in it with his fingernails, releasing a light red mist.

He decided to use the kekkijutsu he had obtained from Tamayo to induce a deep sleep in them. During this sleep, their bodies and souls would realign as well as calm down, finishing the adaptation that is necessary after the transition takes place.

Yes, traveling between worlds could cause a dissonance between body and soul, or worse.

It was even for this reason that Lucian ended up getting Muzan's body.

Which was very fortunate, the demon king's body is simply a top-level physique, much better than ninety-nine percent of bodies.

 However, if he didn't get a body he would end up wandering around as a disembodied spirit, until his soul was destroyed or he managed to condense a spiritual body.

But such a thing would be very complicated, with the destruction of the soul almost a given, and in a very short period of time.

"Okay, they'll be fine when they wake up," said Lucian, relieving Kie and Mitsuri.

"Nakime, put them in a room."

As silent as ever, Nakime merely nodded before manipulating the infinity castle, teleporting each of them to a room with a bed.

"Welcome to the modern world!" Lucian introduced, "Beautiful cars, internet, airplanes, cell phones, a large number of household appliances, good sanitation and much more!"

"Sounds amazing!" As always, the animated Mitsuri was the first to show her excitement.

"It really brings anticipation," commented Shinobu, although he kept her characteristic smile, the sparkle in her eyes betraying her expectation.

The others also had similar reactions; after all, as people from a relatively ancient time, the facilities of modern times were something they were very much looking forward to.

And before long, Lucian opened up the infinite castle for everyone to wander around.

Of course, before doing so he made sure to change Akaza and Gyutaro's appearance, ensuring that no one would be able to notice the peculiarities they both possessed.

Peculiarities that basically screamed "I'm not human".

They marveled at the tall buildings of a modern city, even though they knew about many tall buildings and constructions, they weren't that tall and there weren't that many of them.

They also admired the city lights, which were shining brightly, forming an interesting contrast with the orange color of the sky.

'... Time passed strangely quickly, it must be because of the time distortions,' thought Lucian.

After all, when he appeared in this world it was night, and after wandering the night streets for a while, he had gone to Anteiku.

But in no time at all, the sun was about to set again.

"... Will Kanao like this world?" Shinobu expressed a doubt he had in mind.

"She probably will... what happened to her anyway?" Suddenly Lucian realized something, he hadn't seen Kanao at any time!

"... You've completely forgotten about her, haven't you?" Shinobu was speechless.

"... Maybe."

"Sigh~, I asked Kokushibo to bring her in during the attack on the Demon Slayer Corps and since she refused, she was captured, so now she's trapped in one of the many rooms of the infinite castle." She explained, after letting out a big sigh.

"I see." Lucian nodded.

Then he turned to Akaza: "Later we're going to fight, I'm developing a new martial art."

"Yes." Akaza accepted very quickly, fighting was one of the few things that interested him and taking part in the development of a new martial art would be even more exciting for him.

"That sounds very interesting, I'll join in too," commented Kokushibo from the side.

"It's a hand-to-hand martial art," said Lucian, referring to the fact that Kokushibo is a swordsman.

"Learning different techniques helps to eliminate weaknesses." Kokushibo argued, putting his answer quite simply.

"By the way, when did you capture Kanao?" Lucian was still confused about this, after all, Kokushibo had fought Gyomei.

"After a few hours of fighting, he got tired and so I simply decapitated him, then it didn't take me even two minutes to capture her." Kokushibo described the events.

In his expression there still seemed to be ecstasy over the fight that had been fought that day.

"Wait, you rolled up the fight for fun?!?! Why did I have to go quickly?!" Akaza was exasperated to hear Kokushibo's words.

He had been given explicit orders to finish quickly, so why was Kokushibo allowed to have all the fun?

"Because you're not as strong as Kokushibo, and if you played around you could lose the match," Lucian replied, his words hurting Akaza's warrior pride.

"... Am I weak...?" Akaza's voice became weak and his expression despondent at hearing such cruel words.

"Don't worry, in this world there are many strong individuals, even if they don't possess magical powers, they still have extremely powerful physical abilities." Lucian comforted him.

He wasn't lying, although many ghouls were weak, there were still the rank s ghouls and above, as well as the future dragon, who would appear sooner or later as Doctor Kanou's experiments progressed.

The appearance of the dragon would be very beneficial for Lucian, considering that the dragon is a large union of rc cells.

"Tell me about them!" Akaza was excited to hear Lucian's words.

"In this world, there are ghouls, beings who feed on humans or others of their own kind. Ghouls have an incredibly strong body because of the accumulation of rc cells, and gradually they activate a kagune, while some individuals, by practicing cannibalism extensively, end up reaching a more advanced stage - the kakuja." Lucian gave a short presentation.

"That feed on humans?" Shinobu noticed a very similar point with the demons.

"Exactly, due to some event during evolution, their taste buds and bodies reject anything that isn't human or ghoul meat, the only known exception being coffee. And before you sigh at how cruel the world is, I want you to know that humans can be even worse."

Lucian warned her after explaining a little more about ghouls.

"For example: there is an extremely cruel ghoul nicknamed Jason, who tortures his victims in various ways, but the interesting thing is how he developed this habit. He was captured by a human and tortured, again and again, until he snapped and had a personality disorder."

Unlike the demons that Muzan had created, ghouls have a lot of feelings, fraternal and loving relationships.

Unlike the demon slayers, the CCG investigators don't feel pity, they abandon all principles in order to eliminate ghouls.