Calm Seas Daimyō

He is the daimyō of the Land of Calm Seas.

Background
When the country was dealing with an epidemic, the daimyō used this as an opportunity to make a fortune by restricting medical care to only the highest payers, leaving most of the citizens unable to afford it. Later, the daimyō discovered a medical-nin, Aosa, developing a cheaper and more effective treatment for the population, and sent his elite assassins Kurobane and Jujumaru to eliminate him and his students while also securing their treatment variants.

Personality
While protraying himself a benevolant ruler trying to help his country, he is actually completely self-entitled, willing to sacrifice his citizens for a profit. So shameless, he even was willing to have the people, who selflessly worked so hard to create a cheaper cure for all to use simply on the grounds that it meant less money for him, killed.