Yoshiaki Mogami

最上 義光

Mogami Yoshiaki is the leader of the Mogami clan that rules Dewa Province. He is often known as "the Noble Fox of Dewa." He thinks of himself as a great and smart nobleman. While he is Masamune's maternal uncle, the two of them rarely hint at it, though Yoshiaki refers to him as "Masamune-kun." (Source: Sengoku Basara Wikia, edited)