Ryusui Nanami is a major character in the manga "Dr. STONE" by Riichiro Inagaki and Boichi. He is the "world's greediest" navigator, revived mid-story to usher in the Age of Exploration. The scion of the Nanami Conglomerate, which once dominated the global economy, he has been a genius sailor since childhood, handling real sailing ships from a young age. Senku Ishigami declared him "10 billion percent necessary" for reaching the other side of the planet due to his peerless ability to read winds, tides, and cloud formations to predict the weather perfectly. While extremely arrogant and greedy, his essence is profoundly positive and constructive. He holds the unwavering conviction that "Desire is Justice." Because he wants to own everything in the world, he is more passionate than anyone about reviving lost civilization. His greed is not for taking from others, but serves as the energy to drive the economy, improve technology, and make everyone wealthy. He is the one who introduced the currency "Dragos" and the mechanisms of capitalism to the Stone World. Furthermore, he loves human talent; he fairly evaluates anyone's abilities regardless of who they are and possesses the magnanimity to let them flourish in the right roles. He has a flashy appearance with blond hair and is characterized by snapping his fingers and laughing, "Ha-ha!" As one of the "Five Wise Generals" of the Kingdom of Science, he is a highly charismatic character who leads his allies with intuition and leadership that complements Senku's logical thinking. He stands 187cm tall and his birthday is November 11th. His speech patterns include: "Ha-ha!", "Hmph, ... is just a mere guess, is it not?", "How boorish of you, ...", "It is ...!", "I want it!", "Is it not ...?"