Rose Guinn Avalon, the Queen praised as the "Supreme Rose"
She is the niece of the queen known as the tyrant, the princess with the first right to inherit the throne.
It was she who liberated the people who suffered from harsh governance under the former king's rule.
"Everyone, please regain the glory you once had!
As long as you have a heart that loves the motherland, can't you restore this country to the hometown that everyone loves?
The winter roses have withered, and the belated spring has finally arrived...
I hereby swear an oath! I will be a rose blessed by the Goddess of Light! "
Britannia 627
This is the year... King of Farucion, Charles Bell VI
Change the name of the country to the Holy Farucion Empire and implement the imperial system
He ascended the throne as the first emperor of the empire under the title of St. Charles VI.
And launched an invasion of Britannia in the name of "Holy War"...
Pull out the sword and protect our proud motherland in the fire
Keeping in your heart the rose of the noble queen, my fellow countrymen
Shout out, we are the "Knights of the Rose"!
No matter how powerful the enemy is, he will never be afraid. He will wave his sword and fight for the motherland.
Keeping the noble Queen's rose in your heart, fellow countrymen
Let's go forward, we are the "Knights of the Rose"!
——Sound Horizon "Chronicle 2nd"
Well, the background is probably like this... And then there are many, many characters from other anime...