DX Luccafort, fourth in line for the throne as the son of Ecalipe's renowned general and lord, chafes against the weight of his titles, accolades, and societal expectations. He actively resists the path of power and responsibility dictated by his birth, preferring a simple life driven by personal desire over duty.

His defining motivation is an intense devotion to Marion, the spirit who sacrificed herself to seal a fire dragon threatening the kingdom. Trapped within a protective tree to prevent the dragon's resurrection and direct human contact, Marion's fate compels DX. He leaves his countryside home on a quest to free her, viewing this as his true purpose above all political ambitions.

Accompanied by his sister Lon and bodyguard Rokkou—whom he considers family—DX navigates challenges amplified by his famous lineage. His personality blends a laid-back, serendipitous approach to life with exceptional combat skills and strategic intelligence. Compassionate by nature, he consistently aids others regardless of status, yet harbors profound loneliness stemming from his separation from Marion.

After resolving the dragon threat initiated by his parents, DX enrolls in a capital boarding school. There, his reluctance to engage in political maneuvering or embrace his role as a throne candidate remains evident. He steadfastly refuses power despite external pressure, focusing instead on personal relationships and incremental progress toward reuniting with Marion. Lon and Rokkou remain integral to his journey, their familial bond providing stability amidst conspiracies and societal demands.

DX's resilience and unwavering commitment to Marion consistently prioritize love and personal integrity over destiny or rank. His development underscores a persistent rejection of imposed paths in favor of self-determined choices, regardless of changing external circumstances.