As a person reincarnated from the other world, people might expect Rudeus Greyrat, the protagonist of Mushoku Tensei Jobless Reincarnation, to leave his mark in the form of items that can be found in the modern world, such as massive technological advances in the form of electric appliances and modern food that originated from Japan. However, he instead found a way to leave a more valuable mark on history, one that enabled him to help against his nemesis of the series, even long after his lifetime.