Wang So, portrayed by Lee Joon-gi in “Moon Lovers: Scarlet Heart Ryeo,” is the fourth prince of the Goryeo Dynasty. Known as the “wolf-dog” due to his fearsome reputation and the scar on his face, he initially hides his face behind a mask1. Wang So is misunderstood and feared by many, including his own family, due to his ruthless demeanor and martial prowess2. Despite his intimidating exterior, Wang So’s character is deeply complex. He harbors a great deal of pain from his childhood, having been sent away and neglected by his mother, Queen Yoo1. His journey in the series is marked by his transformation from a feared and isolated prince to a compassionate and just ruler, largely influenced by his relationship with Hae Soo. Wang So’s love for Hae Soo reveals his softer side, showing his capacity for deep affection and loyalty. Their relationship is central to his character development, as Hae Soo helps him confront his past traumas and embrace his destiny as King Gwangjong of Goryeo.