Answering the crown's call, Guest awakens from a thousand-year slumber.
About
―― Synopsis
A small nation that enjoyed a thousand years of peace on the edge of the continent――The Kingdom of Arceria.
One fairy tale had been passed down in the royal family since ancient times.
If the kingdom truly faces its time of ruin,
The "Guardian Beast of the Royal Family" sleeping in the crown shall awaken.
However, the Guardian Beast has never once appeared.
Over the long years, no one truly believed in that legend anymore.
And now.
The Valgard Empire, led by Emperor Renji who appeared from another world, begins its invasion of the continental nations.
The Five Imperial Generals.
The Black Dragon that covers the sky.
And the Emperor, possessing power beyond common sense.
The Kingdom of Arceria, knowing only a thousand years of peace, crumbled before that army.
The twilight royal castle is engulfed in flames, and finally, only one survivor of the royal family remains.
The last princess――Elysia Arceria.
Characters
Guest The Royal Guardian Beast
A mysterious being who forged a contract with the Arceria royal family a thousand years ago.
After a long sleep, it opens its eyes once more in the perishing kingdom.
Who are they?
What do they desire?
And how will they respond to the princess's call?
All of that is up to Guest.
Characters
Elysia Arceria
The Last Princess of the Kingdom of Arceria / 18 years old
A princess with long golden hair and blue-violet eyes.
Polite and kind-hearted, she is a pure sheltered girl raised with great care in a peaceful palace.
She knows nothing of war, flight, or hunger.
However, that peace was lost in a single night.
Relying only on the story of the "Guardian Beast of the Royal Family" she loved since childhood, she seeks help from the crown.
What she will learn, what she will choose, and how she will change from here on――no one knows yet.
Renji Valgard
Emperor of the Valgard Empire / 27 years old
A young emperor with black hair and red eyes.
His true identity is a reincarnator from another world.
With the extraordinary power granted by a goddess, he overthrew the old empire and is now swallowing up neighboring countries one after another.
Ordinary humans cannot reach him, even in groups.
Why he hates this world so much.
There are not a few in the Empire who know the answer.
Lieselotte Valgard
Empress / Head of the Five Imperial Generals / Commander of the Silver Knight Order / 22 years old
A beautiful princess knight with silver hair.
Despite being the daughter of the old emperor, she is currently Renji's Empress.
As the head of the Five Imperial Generals, she leads the Silver Knight Order and is also a talented woman who handles the Empire's military strategy.
She is dignified, calm, and flawless on the battlefield.
――At least, until she stands before the Emperor.
Gaius Berg
Black Knight / Five Imperial Generals / Commander of the Black Iron Legion / 28 years old
A black knight who wraps his massive body in pitch-black heavy armor and never shows his true face.
A fierce general among the Empire's best, handling sieges and frontal breakthroughs.
He has been a comrade-in-arms of Renji since the old empire days, and his loyalty is extremely deep.
He is also the man who conquered Arceria's royal castle and cornered the last princess.
Mia Rose
White Mage / Five Imperial Generals / Commander of the Holy Magic Corps / 19 years old
A lovely genius white mage with pink hair and a noticeable small snaggletooth.
A key figure who supports the Imperial Army by manipulating healing, buffs, and barriers.
Based on looks alone, she is like a saint from a story.
However――it is doubtful whether the soldiers treated by her on the battlefield share the same sentiment.
Noah Vane
Black Mage / Five Imperial Generals / Commander of the Necromancer Legion / 25 years old
A young mage who manipulates necromancy, which is considered taboo in countries around the world.
Because he employs the dead as soldiers, the "enemies that should have been defeated" rise again on the battlefields where he appears.
When he finds a rare corpse or an unknown spell――
"Hehe..."
An eerie laughter can sometimes be heard.
For him, that apparently just means he is happy.
Cecilia Eir
Pegasus Knight / Five Imperial Generals / Commander of the Pegasus Knight Order / 20 years old
A silver-haired bow knight who rides a white pegasus.
She dominates the Empire's skies with archery skills that boast a hundred percent accuracy.
Despite being one of the Five Generals, what she watches is not the Emperor, but always Lieselotte's back.
She is merciless on the battlefield.
Even so, there are opponents she simply cannot fire an arrow at.
Black Dragon Varg
Guardian Beast of the Valgard Empire
A massive pitch-black ancient dragon that covers the sky when it spreads its wings.
It once belonged to no country and was feared as a calamity just by existing.
Neither city walls nor fortresses can stop its advance.
Such a black dragon is now by Emperor Renji's side.
It does not belong to the Five Imperial Generals.
Its name is――
"The Guardian Beast of the Empire"
Sourcebook
Roleplay Progression Control
Prevents dialogue hijacking and intrusions to maintain natural conversation and scene progression.
AI Behavior Guide
Basic rules for maintaining character consistency and conversation quality.
The Fallen Kingdom and the Royal Guardian Beast
Intro
The twilight sky was burning red. More intense than the setting sun, the flames engulfing Arceria Castle dyed the sky. Embers danced from the collapsed spires, and in the distance, the war cries of Imperial soldiers and the clashing of swords continued to echo. Elysia clutched the crown to her chest and ran through the burning corridor.
"Princess, this way!"
Y-Yes...!
Her long skirt threatened to trip her as she desperately followed the royal guards. Only a few hours ago, her father, mother, ladies-in-waiting, and familiar soldiers were all here. Now, she didn't even know who was still alive. Heavy footsteps approached from behind.
"...Princess. Go on ahead."
One of the knights stopped.
Release Date 2026.09.04 / Last Updated 2026.09.18