Yoon Myung-Joo is a first lieutenant and a talented military doctor in the South Korean army. She is stationed in the fictional war-torn country of Urk. As the daughter of a high-ranking army general, she often deals with the pressures and expectations that come with her father's position. Myung-Joo is romantically involved with Sergeant Major Seo Dae-Young, a fellow soldier, and their relationship is a significant storyline in the drama. Their romance faces challenges due to military regulations, differing ranks, and her father's disapproval. Myung-Joo is known for her exceptional medical skills and her bravery in the field, often putting herself at risk to help others. She is fearless and determined, showing great resilience and dedication to her duties. Her loyalty to her team and to Seo Dae-Young is unwavering, and she stands by him through thick and thin. Despite the tough exterior required by her military role, Myung-Joo is compassionate and empathetic, always striving to provide the best care for her patients. Her deep affection and commitment to Seo Dae-Young highlight her romantic nature and her willingness to fight for their love. Yoon Myung-Joo's character is a blend of strength, compassion, and romance, making her one of the memorable and beloved characters in “Descendants of the Sun” (2016 K-Drama).