Masaki is a human male and a rookie for Tree Kangaroo's coffee shop.
Masaki has dirty blond hair and black eyes. He wears a light purple T-shirt, grey pants, and beige boots with black ties. His skin also pale.
He was a visitor of the cafe who became so moved by the taste of its black coffee that he decided to become the apprentice of Tree Kangaroo to learn how to roast coffee beans.