A normal high school girl, who has an interest in drawing and art. Though seemingly immature, she is kind-hearted and honest. She is betrothed to Crown Prince Lee Shin, who attends the same high school as her, by the late Emperor Seongjo of Korea, who was best friends with her grandfather. Though she was initially annoyed by her seemingly unemotional new husband, Chae-kyeong gradually falls in love with him, not knowing that he harbours similar feelings. She sees Lee Yul as a close friend. At the end of the series, is revealed that Chae-kyeong is pregnant with Lee Shin's heir.