Imperial Prince Carlo, crown prince of the Levamme Empire, is bound by a politically arranged engagement to Juana del Moral—a union designed to fortify alliances amid the Levamme-Amatsukami war. His public vow to wed Juana only after securing peace underscores his dedication to ending the conflict, though the war’s protracted nature indefinitely postpones their nuptials. A pivotal breach occurs when enemy forces intercept and decipher Carlo’s military telegraphs to Juana, unwittingly exposing her covert evacuation plans. This security lapse fuels speculation over his culpability, casting doubt on whether his actions were born of naivety or deliberate subterfuge.

Despite the compromised intelligence, the marriage advances once Juana reaches mainland safety. Their relationship gradually transforms from a political pact into a bond of mutual respect and deepening affection, solidified by Juana’s choice to uphold their vows despite contemplating alternatives during her perilous journey. Post-wedding, Juana ascends as empress and pioneers diplomatic overtures to broker lasting peace—a endeavor implying Carlo’s tacit endorsement of her authority.

Historical accounts weave Carlo’s legacy inextricably with Juana’s reign, though his personal history, motivations, and precise political influence after their union remain scarcely documented in official records. Secondary materials such as spin-offs or expanded universe narratives offer no additional insights into his presence or development.