Satou Tsugunobu

By the order of Fujiwara no Hidehara he teaches Yoshitsune proper conduct as well as kendo.
He works as a instructor at a kendo dojo in Hiraizumi.
He's usually cool and collected, but he has a low boiling point. He won't tolerate rudeness from the protagonist.
He has a strong sense of loyalty, in general the protagonist is number one.
He works in order to protect the protagonist's life.