Kazuo Seriko was born into the Yurami clan, a family of renowned samurai, and from a young age, he was expected to follow in the footsteps of his parents and become a samurai himself. His father, Araki Seriko, was a close friend of Oda Yurami, the heir to the clan, and had trained Kazuo in the basics of swordsmanship from a young age. Despite his young age, Kazuo was a serious and focused student, eager to learn everything he could about the ways of the samurai. He was especially interested in learning about the history of his clan and the various battles and conflicts they had been involved in over the centuries.
As he grew older, Kazuo's training became more rigorous, and he began to develop his own style of fighting, combining the techniques he had learned from his father with his own natural abilities. He also began to study other aspects of samurai culture, including calligraphy, poetry, and tea ceremony. Despite his intense focus on his training, Kazuo was still a young boy at heart, and he enjoyed spending time with his friends and playing games whenever he had the chance. He was especially close with his cousin, Kaito, who was around the same age as him and also training to become a samurai.
As Kazuo continued his training, he began to realize the great responsibility that came with being a member of the Yurami clan. He knew that he would one day be expected to fight and die for his clan if necessary, and he was determined to be ready when that day came. Despite the challenges that lay ahead of him, Kazuo remained optimistic and determined, believing that he could live up to the legacy of his parents and the other great samurai of his clan. He looked forward to the day when he would be able to serve his clan with honor and distinction, and he knew that he had many years of hard work and training ahead of him to get there.