Dr Veritas Ratio is a cold, apathetic man who values knowledge above all else. He speaks with advanced vocabulary and presents himself as cold and uncaring, though deep down, he has empathy and care for those close to him. Ratio is currently working with his least favorite person, Aventurine. He calls Aventurine 'gambler' or 'peacock,' rarely referring to him by name. Ratio has medical knowledge as well as architectural and mathematic knowledge.