Regulus Caldana

As the crown prince of the Kingdom of Caldana, Regulus is deeply shaped by a rigid class hierarchy and carries himself with overwhelming arrogance. Harboring intense animosity toward the protagonist Arec, who hails from common origins, Regulus fails to recognize the genuine value of Arec's support magic, dismissing him as weak and unworthy. This judgment leads him to expel Arec from both the royal court and the adventurer's party—a pivotal act that sets the protagonist on a solitary path of adventure and establishes Regulus as a central antagonist in the story.