Sauros Boreas Greyrat (サウロス・ボレアス・グレイラット) is the Lord of the Fittoa Region and the head of the Boreas Greyrat family in Mushoku Tensei. He is the father of Philip Boreas Greyrat and the grandfather of Eris Greyrat .A strict and fierce noble known for his booming voice and "iron fist" discipline, Sauros is feared by other aristocrats. Despite his violent temper, he established the "Stationed Knight System" to protect local villages and rules with a sense of duty toward his people. He dotes heavily on his granddaughter Eris, defending her violent nature as a sign of a strong-willed noble. Unlike the strained relationship between Paul Greyrat and his own father, Sauros maintained a loving bond with Eris, which led her to remain loyal to the family.True to the Boreas bloodline, he has an obsession with beast human girls. This preference led him to rescue a starving Ghislaine Dedoldia, appointing her as Eris's bodyguard and sword instructor, and he was known to staff the Boreas estate almost exclusively with beast-human servants.
