The bartender at the Chatsubo in Chiba. A Russian ex-pat, Ratz has one military-grade prosthetic arm. Although he lives in the surgery capital of the world, Ratz is almost proud of his purely functional, very ugly appendage. He and Case are friendly, if not necessarily friends. When Wage threatens Case in the Chat, Ratz defends him, but he seems more concerned with the safety and reputation of his bar than the safety of his patron.