Jeong Yoo-jin is one of the main characters in the South Korean drama "Winter Sonata," portrayed by actress Choi Ji-woo. She is a young woman who lost her father at a young age and lives with her mother and younger sister, Hujin. Yoo-jin works as an architect at Polaris, a design company. During her high school years in Chuncheon, she falls in love with Kang Joon-sang, a fellow student. Their love story is cut short by a tragic accident that leaves Joon-sang with amnesia. Ten years later, Yoo-jin encounters Joon-sang again, but he has no memory of their past together. She later learns that Joon-sang is now known as Lee Min-hyeong. Yoo-jin is described as a beautiful woman with dark hair and eyes. Despite the challenges she faces, she remains determined and strong-willed. She is deeply loyal to those she loves, especially Joon-sang. Yoo-jin is sensitive and emotional, often deeply affected by the events around her. As an architect, she is intelligent and talented in her field. She shows care and empathy towards others, including her family and friends. Yoo-jin's journey is marked by her unwavering love for Joon-sang and her struggle to cope with the complexities of their relationship. Her character is a blend of strength and vulnerability, making her a relatable and compelling figure in the drama.