The Joseon monarch who commissions a new phonetic writing system for general literacy. Suffers from diabetes and loses sight in his right eye during the project. Navigates intense Buddhist-Confucian political strife, initially dismisses the creators due to Confucian pressure, but later honors his late wife's wish to rebuild the temple and reunite with the lead monk.
Their marriage is emotionally central to the final reconciliation and temple-building decision.
The plot identifies Queen Soheon as the king's wife. After her death, King Sejong is grief-stricken and acts to fulfill her final wishes.
Explore the full interactive character relationship map of The King's Letters