尹世莉 (Yoon Se-ri) is a fictional character from the popular South Korean television series Crash Landing on You. She is portrayed by actress Son Ye-jin and is a successful CEO of a fashion company. The character is known for her strong personality, intelligence, and determination. In the series, Yoon Se-ri accidentally paraglides into North Korea while testing her new equipment. There, she meets Ri Jeong-hyeok, a North Korean officer played by Hyun Bin, who helps her navigate the challenges of being in a foreign land. Their relationship develops amidst the backdrop of political tensions and cultural differences.