Ginga hails from a rural village, living with her widowed father who values her happiness above societal expectations. Her initial reason for entering the imperial selection is practical: securing regular meals and an easier life, not ambition for status or power. She possesses an energetic, impulsive, and outspoken personality, often speaking in a casual, unrefined manner that collides with palace etiquette.

Her journey to the capital showcases inherent curiosity and fearlessness as she actively engages with people and landscapes encountered along the way. This openness attracts protective allies like the mercenaries Konton and Heisho, who initially escort her party. Within the imperial court, she resides alongside three other candidates: the aristocratic Seshamin, the laid-back Kouyou, and the covertly royal Tamyun. Ginga's unfiltered behavior initially conflicts with palace norms but evolves via rigorous education in history, literature, and etiquette under Professor Kakuto. She develops a genuine enthusiasm for learning, particularly awed by the palace's vast library.

Unexpectedly, she encounters the young Emperor Koryun before knowing his identity, establishing rapport through their mutual, unguarded interactions. Upon being chosen as his bride, she reconciles this relationship with his imperial role. During a rebellion led partly by boredom by Konton and Heisho, Ginga demonstrates leadership by organizing the remaining candidates to defend the Inner Palace using salvaged weaponry. This culminates in a critical confrontation where she prioritizes protecting lives over rigid hierarchy.

In the resolution, she shares a final private moment with Koryun, reflecting on their circumstances before the rebellion's outcome. An epilogue reveals her eventual reign as Empress, characterized by benevolent reforms that diverged from traditional expectations.