Ji Sung-joon is a fictional character from the South Korean television series She Was Pretty. He is portrayed as a successful and handsome editor who works for a fashion magazine. Ji Sung-joon is known for his kind personality and his ability to support his friends, especially the main character, Kim Hye-jin. Throughout the series, Ji Sung-joon undergoes significant character development, showcasing his struggles with self-image and relationships. His journey highlights themes of love, friendship, and personal growth, making him a relatable and endearing character for viewers.