Scarlet Heart Ryeo Wang: So

But the mask is a metaphor. So wears it to protect himself from a family that sees him as a curse. His mother hates him. His brothers mock him. His father, the King, ignores him. So learns one brutal lesson early:

The final shot of the series is the most devastating: an old King Gwangjong, alone in the rain, clutching Hae Soo’s hairpin, whispering, “If we meet in another life… don’t let me go.” scarlet heart ryeo wang so

Here is why the Fourth Prince’s journey is one of the most tragic arcs ever written. Let’s start with the obvious: the scar. When a young So tried to stop his mother (Queen Yoo) from leaving the palace, she threw a bowl at his face. The wound festered, leaving a long, jagged line. From that day, he was forced to wear a metal and leather mask to cover the “blemish.” But the mask is a metaphor

When Hae Soo (IU) first sees him, she’s terrified. But she’s the only one who asks to see under the mask. That moment—when she gently touches his scar and says, “It doesn’t make you a monster”—is the key that unlocks his entire soul. Lee Joon-gi’s performance is a masterclass in restraint. Wang So doesn’t emote loudly. He watches. He waits. He clenches his jaw until it looks like it might crack. His brothers mock him

Warning: Major spoilers ahead for Scarlet Heart: Ryeo .

The answer is King Gwangjong. A man who won everything and lost the only thing that mattered.

He enters the frame like a horror movie villain—half-faced mask, cold eyes, a reputation for bathing in blood. He is the "Wolf Dog" of the Goryeo court: feared, unwanted, and feral. But by the end of episode 20, we aren't afraid of him. We are devastated for him.