Tranquil

...A definition of the word tranquil can be "free from agitation of mind or spirit". I think the good-hearted buddhist monk Komuso fits this description. Another definition of tranquil is "free from disturbance or turmoil". That may however not fit too well with this character, considering he is bothered by demons and imps whenever Amaterasu encounters him. However Komuso never lets the forces of evil stop him from playing his flute. Hence tranquil by third definition also can mean "unvarying in aspect", and "steady" or "stable"...

Roasted

...Amaterasu roasting a green imp using the inferno brush stroke...