Master is the owner of the Strawberry Cafe in Jewel Land, a role he fulfills with a quiet and reserved demeanor. Physically, he is a middle-aged man with graying hair, a mustache, and a noticeably athletic and muscular build, often seen dressed in attire reminiscent of a sommelier. Beneath his calm and composed exterior lies a deeply sensitive and emotional personality. He is prone to fainting or being brought to tears by overwhelming situations, such as receiving a large bill or having his prized plate collection accidentally broken. Despite a somewhat thin sense of responsibility for his position, he manages the cafe and serves as the boss of Garnet, who works there as a part-time employee. His quiet nature makes him somewhat of an object of affection for Shoko, one of the students at Sunshine Academy, who harbors a crush on him. Master's motivations are primarily tied to the steady operation of his cafe, and his role in the story is that of a supporting adult figure who provides a consistent setting and occasional comic relief through his exaggerated reactions to stress. His ability to cope with everyday crises, even if done with a faint heart, defines his notable trait as someone who endures the chaotic situations that arise around the students.