Drago, an elderly dragon, resides near the human settlement housing Yucie and her adoptive father Gunbard. He shares a close connection with Yucie, who regularly feeds a younger dragon named Jin at her window each morning.

Acting as a knowledgeable adviser to Yucie, Drago provides her with crucial information about significant events. When others mistakenly believe the royal castle invites local girls to find a wife for the prince, Drago correctly informs Yucie that the true purpose is identifying candidates for the Platinum Princess selection. His guidance directly influences Yucie's decision to participate.

His role extends beyond information-sharing, positioning him as a supportive figure in Yucie's journey. Drago demonstrates familiarity with the legends of the Eternal Tiara and the processes of the Princess Academy, indicating a broad understanding of the world's mystical and political structures. His interactions with Yucie reflect a mentorship dynamic, offering direction during her uncertainty.