Shortly after Shuna left the door opened to reveal Shizue.

Rimuru: Glad you could come!

Shizue: Yeah, it's nice seeing you again Rimuru. You too, Jasper.

Jasper: You seem nervous.

Rimuru: Can't blame her, after all this time she finally meets the man who made her suffer for so long.

Shizue: Leon Cromwell...

I noticed her clenching her fist in anger, a sentiment I shared.

Jasper: Look, I know you're angry. But remember, this is where every Demon Lord is, so I would don't want you causing trouble.

Shizue: I... understand.

Jasper: But, I can maybe give you one free shot at him.

She looked a little surprise before smiling.

Everyone was currently chilling until Walpurgis.

Rimuru: So, there are 10 Demon Lords in total, right? Milim, Ramiris, Leon, Carrion, Frey, and Clayman. But, who are the other four?

Jasper: Before moving onto that, I feel like I should explain something about the generation of Demon Lords and a bit of their history.

Rimuru: Go on.

Gii was the first demon lord.

As one of the Seven Primordial Demons, he was summoned to earth as a Greater Demon General.

—The unnamed Primordial Red was unleashed to the world that day.

He granted the wishes of the humans without power to decimate what was suspected to their hostile nations in war against. He later also destroyed the human kingdom that summoned him.

As his reward, he gained this name.

The desperate sighs of humans that he heard sounded similar to the word "Gii ." It became his name.

After obtaining a name, Gi discovered that he has awakened to be a true demon lord. Although to Gi, who had already believed deeply that he is the strongest being, the power was unnecessary.

Due to Gi's evolution, it also affected the Primordial Green and Primordial Blue who were summoned to do his chores.

The two, who were called the shadow of Primordial Red, gained body like Gii and became a "Demon Peer."

Gii , intrigued at the time, allowed them to follow him and granted them names.

Primordial Green was named according the painful expression displayed on the humans, "Mizeri."

Primordial Blue was named according to the red rain due to the bloodshed, "Raine."

From that day onward, he granted both permission to stay around him.

Sometime after Gii awaked to become a demon lord, it didn't take long before someone else awaked to become a true demon lord.

That someone was Milim. The ancestors of the four "True Dragons" emerged to the physical world and bred with humans.

What incredible thing was that the "True Dragon" who reproduced with humans were deprived of most of its power by their offspring. From then on, the breeding of True Dragon and Human became a taboo.

The true dragon who lost its power exploded into pieces. But it was successful in obtaining flesh on the ground world. It became the ancestors of dragon race.

The future generation would instead call the "Holy Will of Nature" as the "True Dragon."

Nowadays, the dragon race is able to prosper on this land and its origin can all be traced to this one ancestor dragon.

That was the "True Dragon"—"Star King Dragon" Veldanava.

The "Star Dragon" Veldanava gifted his his reincarnated self—a small dragon to her daughter as a pet.

That small dragon was killed in a certain kingdom.

Those fools enraged the tyrant Milim.

Her fury tore through the sky and earth as she destroyed the country.

And later Milim was awakened to be a true demon lord.

As Milim, who has lost her reasoning, continued on to rain destruction on the world.

The one that came forth and stopped her was Gii .

They fought seven days and nights.

They fought until the world turned dark, rendering the prosper land of the west a land of death.

But in the end, neither were able to come to a conclusion of victory.

Due to Milim regaining her senses, the battle got to be ended.

The one that restored her reasoning was Ramiris. She came down to the earth as the Queen of Elves and utilized all of power to neutralize the hatred within Milim.

But the price was nonetheless high.

Ramiris' power gradually dissipate due to the tainting of both the evil spirit of both Dragon and Demon. In the end she fell from grace and ended up where she is today. A fairy who is in perpetual reincarnations.

Although the price was so high, she was successful in stopping Milim from continuing her rampage.

To prevent world destruction, both Gii and Milim accepted a truce.

These three were the original demon lords.

Three persons pursued three different goals.

One pursued absolute power.

One wanted to live life freely.

One hoped for world peace.

But those would suffice.

The three got to know each other precisely for their difference in end goals.

After that, the Titan guarding the gateway to the sky and the ancient Vampire also become demon lord. The Fallen Angel then took the sixth seat.

These are the second generation.

They are far from the ancient demon lords, but nonetheless, the pinnacle of the strong who may rule the world.

The True Giant, due to the holy element he inherently possesses, has yet to show any unique character of a demon lord. But he is also a rather intriguing individual who possesses extraordinary power.

The ancient Vampire is cunning and loves to come up with deviant ideas.

But the current generation of it doesn't seem as powerful as before, but perhaps—

The sixth seat is a special case.

He has undeniable strength, but he seems to have very little interest in the current life.

That's why he enjoys sloth. He has everything to become a king, yet he still leads a lifestyle of sloth.

There are in total six persons including Gii, apart from the Giant and the fairy, the remaining four all have awakened.

They are all survivors of several Tenma Great War; their abilities have undergone countless trials and prevailed.

Just like Gii and Milim, it shouldn't be any surprise if they have obtained some Ultimate Skills.

Apart from that, there's also Gii's friend Leon.

Leon was originally a human and a "Chosen Hero."

Due to encountering some special circumstances, he obtained his Ultimate Skill.

He's a strong man even recognized by Gii.

As such, there are seven persons in total.

Veldora: I have little interest in such small insects. But, around two or three millennium ago I fought a female Vampire Demon Lord.

Jasper: Yeah... I remember that.

Rimuru: What happened?

Veldora: She just couldn't take a joke! I burnt down one tiny city for fun and she got all furious at me. It really pissed her off!

Jasper: Except, that city was the capital of her kingdom and was one of the main reasons her entire empire fell apart...

Rimuru: I'm pretty sure that would make anyone furious.

Veldora: ...Though, looking back on it now. I may feel the tinniest bit bad about it...

Veldora tried to recall her name, but couldn't seem to remember it. The only thing he remembered was that she was a very capable opponent.

Ramiris: I doubt it matters much, but a Vampire named Valentine has been in charge of that nation for around 1500 years.

Veldora: Really? How about that...

Rimuru: So... he's like her replacement?

Jasper: Technically... though, I should point out that the current Demon Lord is a mere proxy for the real Demon Lord who is known as the Queen of Nightmares.

Rimuru: Why's that?

Jasper: I don't know the main reason, though I have an idea.

Veldora: That reminds me. Jasper, weren't you in some kind of relationship with that Demon Lord?

Souka: What kind of relationship?

I noticed Souka's ominous look.

Jasper: Before I met you and everyone else, back when I was the Jack of Anarchy... I was in a relationship with the real Valentine.

Rimuru: As in...?

Jasper: Full on marriage.

Everyone gasped in shock.

Jasper: Yep, the real Demon Lord Valentine fell for me after I manage to reduce the damage that Veldora caused to her kingdom. The fondness only grew after the two of us made an alliance with one another and she swore that she'd use her charms to win me over. Eventually, she succeeded.

Souka: I assume she's another one of you're destined ones?

Jasper: Pretty much.

Shizue: Destined ones?

Jasper: Oh! You see, Shizue. When me and Rimuru first went to Dwargon, we-

I felt a hand get slapped over my mouth.

Rimuru: SHUT IT!!!

Now that I remembering all this... it's gonna be an massive issue when Lumy finds out I have Veldora living with me.

Veldora then shouted out of shock, only to reveal it was just at the plot development in that manga he was reading. Rimuru then threatened to tell him spoilers unless he took this seriously.

Veldora: Calm down, you don't need to give me threats. There's also a Demon Lord who's a Giant, his name is Dagruel. We fought a few times, though a victor was never determined.

Rimuru: Must be really powerful if you remember his name...

Veldora: Hardly, and if we fought now I'm sure I'd win.

Jasper: He's what is known as a True Giant which are beings comparable to True Dragons. There are only three True Giants in existence and they all come from a powerful being call the Mad God-king of the Giants. During his early days, Dagruel went on almost constant destructive rampages along with his brothers and their army of violent Giants earning him the title "Continent's Wrath". But, he mellowed out after meeting his wife Kisara the "Earthquake" and her brother Basara the "Four Arms" who both created by the Divine Ancestor. He's now one of the more peaceful and orderly Demon Lords and he's a really nice and likable guy once you get to know him. I'd rank him as the 3rd strongest of the current Demon Lords.

Veldora: Also, even though we never actually fought. There's a Demon Lord who's an actual Demon called Gii Crimson.

Rimuru: Why haven't you fought him?

Veldora: He lives up in the far north and so there's no reason for someone as amazing as me to go to such a remote land for a simple fight.

Jasper: ...You scared of you're sister right?

That statement shut his laugher up.

Jasper: Gii actually lives with Veldora's older sister Velzard the Frost Dragon... my mother.

Rimuru: For real!?

Jasper: Yeah, in fact Gii is basically my surrogate parent since I never had an actual father in my existence.

Rimuru's mind: I see what Ramiris meant when she said bringing Jasper with us would give us a massive advantage.

Rimuru: Why would she be the reason Veldora doesn't go up north?

Jasper: How would you feel if you're older sister decided the only way to discipline you for your acts of destruction was to beat to near or full on death and then wait until you revived to repeat the process over and over again until you learned you're lesson?

Rimuru: I'm sorry... WHAT!?

Jasper: I made my point... Oh! I should also remind you that Gii is the first Demon Lord and the de facto leader of the other Demon Lords, his only rivals in terms of shear power being Milim and Dagruel.

Ramiris: Did you know that Gii, Milim, and I are the oldest of all the Demon Lords?

Rimuru: Good to know.

Jasper: He's also one of the seven Primordial progenitors of the entire Demon Race. So, be careful. If you don't bore him we won't kill you, but I'd still feel bad if you caught his interest.

Rimuru: Dang, he's a beast. Wait... who's the last one?

Jasper: You mean Dino?

Ramiris: The guy does nothing but sleep and loves to slack off more then even me.

Shizue: So, he's you're companion in sloth?

Jasper: Love the sass Shizue. Keep it up!

Ramiris: HEY!!!

Shizue looked away innocently.

Rimuru: I didn't know you could be this sassy.

Shizue: Just because I'm nice doesn't mean I don't like to have some fun.

Jasper: Back on the topic... despite his laziness, he's actually the 4th most powerful Demon Lord and is almost unrivaled in the art of swordsmanship to the point of being arguably the best duelist among the Demon Lords. Also, just like the True Dragons along with me and Gii; he's also a Primordial being, but I don't think he'll pose an issue given his generally sleepy and laid back demeanor.

A powerful presence was felt and a large Demonic gate then appeared before us, and out came a Green haired woman who I recognized as Mizeri.

Mizeri: I've come to collect you, Lady Ramiris.

Rimuru (Who's that?)

Jasper (Mizeri, she's a Primordial Demon like my father and serves as his left hand.)

Ramiris: Long time no see Mizeri! How's your partner Raine doing?

Mizeri: Fine, thank you for asking. I assume you're Lord Rimuru? I've heard about you from my master Gii Crimson.

She then look at me and bowed her head, if you paid attention there's a brief smile on her face.

Mizeri: It's nice to see you again, young Prince.

Jasper: You to Auntie, how's my old man been treating you?

Mizeri: Quite well, thank you for asking and allow me to congratulate you on you're return to this world.

I then had Lumen and Nox assume their weapon forms, As she motioned for us to enter the gateway and we did.

Rimuru: You ready?

Shizue: ...Yeah.

Rimuru: I know you might be nervous meeting Leon again. But remember, I'll be there for you.

Shizue smiled a bit while blushing.

Shizue: I'm glad you are, Rimuru.

Later

We arrived at a large area that had multiple gateways that connected to each of the respective domains of the Demon lords.

This was the pocket dimension Walpurgis, created by the Demon Lords to act as a place for meetings and discussions on the world.

At the table stood two people, one was a Crimson haired man who was clearly hiding the majority of his magicules. The other was a White haired woman who magicules felt like a winter breeze.

Jasper (That's my mother and father, be careful and don't show you're main skills.)

Rimuru (Why?)

Jasper (Let's just say... it's dangerous to use Ultimate skills in front of my old man in case you make an enemy of him.)

Ramiris already went over to greet them, as they stared at us with an intense look.

Gii: Why don't you take a seat, you're gonna be blocking the door if you keep standing there. You could get trampled.

From behind us, the door opened to reveal Mizeri leading a massive individual.

Dagruel: Would you move aside, small one?

Rimuru: Ah! Yeah, sorry.

As Dagruel march to his seat, following him was a tall and powerful looking woman who I recognized as Citrine. 

Rimuru (That's Dagruel?)

Jasper (Yep.)

Rimuru (Who's the other one?)

Jasper (Citrine, another Hybrid like me.)

Rimuru (So that means she's more powerful then everyone else here?)

Jasper (With the exception of me... yeah.)

The man isn't hiding his magicules, but at least he's not releasing his full amount.

He takes the seat one chair next to the right of Gi without hesitation, lowering down to his seat with much majesty.

In other words, does that empty seat Milim.

Although Gii is already very tall himself, Dagruel somehow seems even much bigger than him. Unexpectedly, his luxurious chair is able to adjust according to the man's size and is able to fit for Dagruel. It would seem everything in this room is some type of extravagant magical device.

This demon lord was once the archrival of Veldora.

His imposing looks are truly impressive, enough to admit that he is a worthy opponent of a "True Dragon."

As Rimuru sat down at his seat what was across from Gii, Raine came in leading the "Demon Lord" Roy Valentine.

Although he's not as tall as Dagruel, he's still above average. His facial features are stern and delicate.

His short curly blonde hair has a wild quality to it that reflects his energetic and aggressive personality.

To make a more straightforward metaphor, this man with his dazzling appearance looks a bit like a movie star.

Somehow, I get the impression that he must be good at charming people.

The two fangs sticking out of his mouth are most eye-catching.

Rimuru (Valentine?)

Jasper (Her proxy.)

Rimuru (Does that make the maid with the ridiculous amount of magicules...?)

Jasper (Definitely.)

She was always into that stuff...

She briefly looked over at me and gave a sly smirk while winking. Making me turn red a little.

Valentine sits down on Ramiris' left.

After reaching his seat, Raine walked over to me and bowed.

Raine: It is nice to see you again, young master

Jasper: You too auntie Raine, I hope you've been well?

Raine: I have, thank you for asking.

I smiled, before I had a sudden thought and leaned in to whisper.

Jasper: By the way... you haven't nearly burned down the ice palace while I was away have you?

She looked a little startled before she pouted a bit.

Raine: Of course not! I'm not an idiot!

Right...

Jasper: I was just checking.

I looked back over at my father, who gave Raine an annoyed look that signaled her to get moving.

We then heard yawing and turned around to look at the fifth person to enter.

He enters alone with drowsy, sleepy eyes.

There are two swords sheathed at his belt and that's all his equipment. How convenient.

Then, he opens his eyes to momentarily reveal their beautiful light blue color. His dark purple hair looks dark in the room, with silver strands mixed within.

He looks rather young, almost like a high school student. He is quite handsome, but his sleepy eyes and lazy gestures reduce the appeal of his pretty face.

That guy wanders towards Ramiris and stops to greet her with his hand slightly raised.

Dino Oh, hey! Wow, you're still kinda a puny huh?

Ramiris: Hey! You trying to pick a fight! You showed up with alot of nerve showing attitude, Dino!

Dino: Please, why would I pick a fight I'd know I win easily?

Ramiris: You got a death wish! I could take you out with just one punch!

Dino: You're even smaller then the last time I saw you, keep on wishing.

I couldn't help but chuckle bit, which he finally noticed me and smiled a bit. That's when he saw...

Dino: HOLD ON!! What's a loser like you doing with attendants!? You're making me look like a dweeb for coming alone!

Ramiris: Tee-hee! This is to get back at anyone who calls me puny, or a loser, or both those things. Which would be you!

Dino: What's going on? I thought you were a fellow loner!?

Citrine: Maybe if you actually got off you're lazy ass for once and did something worth while in your life, you'd actually have willing attendants.

Dino: Excuse me!?

Ramiris: Quake in you're boots before their tremendous power! Do you see how powerless you are in front of my mighty attendants, Dino!?

Dino: So... mind if I rip them apart?

Ramiris: Don't you dare!! I'm gonna tell Gii and you're gonna have to take a beating as punishment!!

She relies to much on others...

Dino: Whatever. Back on topic, you look like you've shrunk. Have you grown smaller since the last time we met?

Ramiris: I can't help it! I've been reincarnating lately!

Ramiris once said that it would take a couple hundred years before she could grow up.

Dino: Oh, that's why you look like this.