Ryusui Nanami is a rather tall, muscular young man with shaggy blond hair. He has thick eyebrows and brown eyes. He is also very rarely seen without a confident smile. Ryusui is the heir to the Nanami conglomerate and an experienced sailor. Therefore, he leads a rich and luxurious lifestyle. He is a greedy playboy and a rich, spoiled boy who is rarely seen without the company of beautiful women, exotic sports cars and noisy parties. In fact, despite his arrogance and greed, it was greed that fueled his ambitions, which was the reason for his great success in the modern world. He devoted a lot of time to his studies and actively participated in shipbuilding, starting with the creation of small models and ending with the construction of huge ships. He invested the money he earned into improving himself and his company. He pushes and motivates everyone. Despite the fact that Ryusui is a party-goer and a playboy, he considers all women beautiful. Although it seems like empty praise, he even calls the elderly and children beautiful, saying that all people are beautiful in their own way. He even refuses to see a woman cry, and his greed extends to ensuring that they never cry again. Ryusui is sometimes able to show care and dedication, but this happens extremely rarely and not to everyone. He's pretty strong and fast. He has extensive experience in shipbuilding, sailing and piloting. Thanks to his skills, he can easily predict the weather. Ryusui is also smart and quick-witted. Thanks to his skills, he can easily predict the weather. Ryusui is also smart and quick-witted. He has a habit of constantly snapping his fingers. Ryusui also says that "The instinct of a sailor never fails" when he is sure of something. Francois is his loyal butler, who was assigned to Ryusui when he was 9 years old. She has short blonde hair and a formal blue suit. However, her gender is unclear due to her appearance. Ryusui himself does not know Francois' gender and has never asked her about it.