Hae Soo, originally Go Ha Jin, is a modern-day woman who finds herself transported back to the Goryeo Dynasty in Moon Lovers: Scarlet Heart Ryeo. She is characterized by her strong-willed and compassionate nature. Hae Soo is deeply empathetic, often going out of her way to help others, even at great personal risk. Her modern sensibilities and independent spirit frequently clash with the traditional norms of the time, but she remains steadfast in her beliefs. Hae Soo’s resilience and optimism make her a beacon of hope for those around her, and her ability to inspire and uplift others is one of her most endearing qualities. Her romantic entanglements, particularly with Wang So, highlight her capacity for deep love and emotional complexity.