Hyrince Quarto is Julius's childhood friend as well as the tank of the Hero party. As the second son of Duke Quarto of the Analeit Kingdom, he is a proud noble who has dedicated himself to protecting his friends and home. He is an uncle-like figure in Shun's life. Volume 13 Spoilers

Spoiler

It is later revealed that Hyrince is a clone of Güliedistodiez created to watch over the current holder of the Hero Title. The human infant Hyrince was stillborn, therefore, the Dragon God implanted his soul to begin his first experience as a human through the long influence of Sariel.