Dominicus is a century-old sage preserving his youth through magic. He knew King Kyle and Illya, Kyle's half-sister, in their time. To shield Kyle's bloodline, he engineered the infant Kasel's relocation from the capital, aiming for an ordinary life. This involved placing Kyle's wife into a deep magical slumber until she awakened solely to give birth.

After demons killed Kasel's mother, Dominicus found Kasel to unveil his heritage as the legendary king's son. He revealed Kasel's destiny to thwart the Dark Lord Angmund's resurrection by retrieving the holy sword Eia, the same weapon Kyle wielded a century ago. When Kasel's friend Clause vanished on reconnaissance, Dominicus organized and dispatched Kasel and allies on a critical mission to locate the sealed sword and probe demonic threats.

His actions are rooted in his history fighting Angmund and his commitment to Orvelia's future. He holds deep knowledge of Kyle's corruption by Angmund and Illya's creation of a techno-magical device to counter the Dark Lord. Dominicus's guidance proves pivotal throughout Kasel's journey.