Rias along with team 7 consisting of Darman Uchiha, Eka Senju and his daughter Anissa Uzumaki went to the Demon Kingdom.The ghost country where she used to live.
Rias recalled the memories when she was still attending the Demon Academy in Kuoh Demon Kingdom.
She and her nobility participated in the war against the Space Gods who were then led by Kaguya and Ishiki.
while the 4 Demon Kings led by Jun Ryu Matsumoto as the Primordial Demon.
They died in the great war. They died in the Great War against Yu ha bah and the Seven Great Primordials. At one time in the Kuoh Demon Kingdom, Rias was silent in her memories of the times when she was still attending the Demon Academy. Bitter and sweet memories flowed so clearly in her mind, when she and the other nobles participated in the war against the Space Gods led by Kaguya and Ishiki.
The war was led by the Four Demon Kings led by Jun Ryu Matsumoto as the Primordial Demon. They were heroes who led the Demon army in battle against the forces that spread horror throughout the kingdom. However, fate had other plans, they all died in the Great War against Yu ha bah and the Seven Great Primordials.
Rias remembered how the nobles and the demon people fought together with great passion to fight against an undefeatable enemy. They did everything they could to protect their kingdom, but the power of the Space God and the Seven Great Primordials was too much for them to resist. Even so, the spirit and courage they showed in that battle will always be remembered by the people of the Kuoh Demon Kingdom.
For years, Rias has devoted herself to protecting the kingdom and maintaining its fragile peace. Every day, she continues to remember the memories of those who have died in that terrible war. Be it her friends, fellow demons, or the Four Demon Lords whom she respected so much.
Rias reflected on how they were all willing to sacrifice themselves for the happiness and safety of the kingdom. They were true heroes who never gave up despite knowing the risks and consequences that might occur. Every second of that battle, they fought with all their hearts and souls.
However, even though they are gone, their spirit and courage live on in Rias and all the people of the Kuoh Demon Kingdom. They are a living example of the power of unity and fearless courage in the face of an enemy stronger than them. In her memories, Rias couldn't hold back the tears that streamed down her cheeks. Feelings of pride and sadness mixed in her heart as she reflected on the sacrifices made by these heroes. They were figures that would never be forgotten by the history of the Kuoh Demon Kingdom.
As Vasilius of Kuoh, Rias swore to continue bringing peace and justice to her kingdom. She was determined to continue the legacy of the heroes who had passed away, so that their names would continue to be remembered and respected by future generations.
With a strong spirit and determination, Rias stood tall and ready to face any challenges that might threaten the peace of the Kuoh Demon Kingdom. She would continue to remember and appreciate the struggles of the heroes of the past, while trying to maintain the peace and tranquility of their kingdom.
In her mind, Rias was sure that the spirit and courage of these heroes would live on forever, burning brightly in the hearts of every citizen of the Kuoh Demon Kingdom. They were a light that would never be extinguished, inspiring and guiding them in facing a future filled with obstacles and trials.
And in the end, Rias vowed to guard and protect the Kuoh Demon Kingdom with all her strength and abilities, just like the heroes of the past who had made the greatest sacrifice for their beloved kingdom.