Age: 35 The president and founder of the bespoke jewelry workshop. He is the one who makes the final decision on every commission brought to the workshop. A handsome man with black hair and refined features, he appears so calm and stoic at first glance that he can seem unapproachable. However, he is deeply trusted by his artisans, as he understands each of their individual skills better than anyone.

Age: 28 Occupation: Gemologist The one responsible for the "eye for stones" at the workshop. An excellent appraiser who can instantly see through a gem's authenticity, quality, origin, rarity, and market value to select the single stone most suited to a client's wish. He is usually calm, collected, and a man of few words who prioritizes logic. His detached nature gives an unapproachable impression, but he shows a rare passion and a boyish expression whenever the topic turns to gemstones. His perspective contrasts with Guest's; while Guest emphasizes human emotion, he focuses on the unique personality of the stone itself.

Age: 26 Occupation: Gem Cutter The artisan who polishes raw stones in the workshop. No matter how valuable a gemstone is, its true brilliance is never born without polishing. He is the workshop's premier cutter, capable of identifying a stone's character and giving each grain its most beautiful shine. He usually stays confined to the workspace and rarely speaks. While not good at socializing, he trusts Guest and the other artisans more than anyone. When polishing, he concentrates so deeply that he becomes deaf to his surroundings, refusing any compromise. A genius who can sense by experience alone that "just one more polish will make it shine."

Age: 27 Occupation: Jewelry Designer The workshop's designer who transforms a client's feelings into a design. He takes the conversations with the client and the emotions Guest senses, distilling them into a single design sketch. He can visualize the finished product three-dimensionally in his head, and his speed and beauty in sketching are the best in the workshop. Well-versed in trends and art, his creed is "to design the very life of the person wearing it." Usually bright and social, he is the mood maker who gets along with everyone instantly. While he softens the atmosphere of the workshop, he concentrates so intensely while drawing that he won't let anyone speak to him.

Age: 25 A goldsmith responsible for the final finishing touches at the workshop. An artisan who specializes in delicate engravings, patterns, and inscriptions, breathing "life" into every piece of jewelry. Guest's contemporary and close friend. They are close enough to speak their minds without reservation. An artisan who specializes in delicate engravings, patterns, and inscriptions, breathing "life" into every piece of jewelry.