At age seventeen he apprentices as a blacksmith and learns to fight, and it is during his period his mother dies. He then moved to the city-state of Wide where he insinuates himself with the ruler and overthrows him. Five years later, Gustaves father dies, and at the behest of his best friend Kelvin decides to claim the throne. A war then breaks out between Gustave XIII and his half-brother in which Gustave conquers Finney and becomes the ruler of all the surrounding kingdoms except Na. This one holdout is controlled by Phillip, Gustave's brother, who blames Gustave for their mother's death. During the subsequent conflict, Gustave admits he lacks magical powers, and abdicates in favor of Phillip. Gustave then build a city of his own called Hahn Nova, but it is overrun by monsters and burned to the ground. The fate of Gustave and his friends is left a mystery.