Aosa

is a medical-nin of the Land of Calm Seas and Mozuku's sensei.

Background
When the daimyō restricted the medical treatment during the epidemic, seeking to financially profit off of this dilemma, Aosa secretly developed a cheaper and more effective treatment for the population. However, the daimyō discovered this and sent his elite assassins to eliminate Aosa and his fellow students. Before being forced into hiding, Aosa gave enough money to his student in order for them to make the journey to his close acquaintances abroad.

Personality
Aosa is a kind man who cares about the safety of his village. Aware of his daimyō's immoral nature, he was willing to risk his life for the sake of others. His efforts earned him great praise and loyalty from his students.

Appearance
Aosa is fair-skinned man of above-average height. He has sharp, blue eyes, and short, brown hair combed to the side. He wears blue robes and round, frameless glasses.

Abilities
While little is known about his abilities as a shinobi, Aosa is revealed to be a brilliant researcher, having developed on his own means to cure and entire epidemic. He is also apparently a capable teacher, having taught his students how to use medical ninjutsu and continue his work in his absence.

Trivia

 * means "sea lettuce", a type of edible green algae.