Date Masamune

A mighty warrior who excels in physical strength, martial arts, and horseback riding. In particular, he possesses unrivaled command of the bow and arrow.

He is summoned as the most skilled and revered "commander" of the main character's country. His easygoing nature leads you to rely on him like an older brother.

As he was the leader of a country in his own time, he feels a little out of place here.