Hiroshi Seriko was the younger brother of Araki Seriko's father and a trusted advisor to the current warlord of Clan Yurami, Hakari Yurami. Hiroshi had served the clan for many years, first as a skilled warrior, then as an advisor, and finally as a trusted friend of the Yurami family. He was known for his intelligence, cunning, and his deep knowledge of politics and strategy. Hiroshi was a respected figure in the clan, and his advice was often sought out by the Yurami leaders. He was particularly close to Hakari Yurami, who relied on him for his wise counsel and sharp wit. Hiroshi was also well-liked by the other samurai in the clan, who respected him for his years of service and his unwavering loyalty to the Yurami family.
Despite his advanced age, Hiroshi remained active in the affairs of the clan, often accompanying Hakari Yurami on his travels and advising him on matters of state. He was also a mentor to many of the younger samurai in the clan, teaching them the skills they would need to serve the Yurami family with honor and distinction. Hiroshi was known to have a quick temper and was not afraid to speak his mind, even if it meant challenging the opinions of the clan's leadership. However, his loyalty to the Yurami family was never in doubt, and he always put the interests of the clan first.
As he grew older, Hiroshi began to suffer from a number of health problems, including poor eyesight. However, he remained active and continued to serve the Yurami family until his death, which was mourned by all those who knew him.