A veteran soldier wracked with remorse, Eugen once traveled the skies alongside Rackam as a skyfarer, but has since returned to his home on the Auguste Isles. Working as a mercenary fighting against the empire, he shares some kind of deep connection with the Black Knight, but chooses to run from it, saying he's too old to deal with it. It's during his attempts to flee from responsibility that he encounters Gran and decides to travel alongside him to stand up to his past. A crafty fellow, Eugen often mystifies others with sayings accumulated from his years of experience.