Master's Sun — Characters & Cast

Initially driven to protect his wealth and locate his missing 10 billion won ransom necklace; later evolves to protect Gong-shil from fear and earn a place by her side as an equal partner.

Transforms from a cold, money-driven chaebol crippled by trauma-induced illiteracy into a selfless protector who sacrifices his life for Gong-shil, reclaims his lost past, and embraces an emotionally open existence.

Initially seeks uninterrupted sleep and sanctuary from terrifying spirits; evolves toward using her spiritual gifts to help trapped souls while pursuing love without burdening others.

Develops from an exhausted, terrified wreck using Joong-won as an emotional crutch into a courageous, independent medium who embraces her abilities with dignity and reclaims her self-worth.

Initially aims to fulfill his corporate surveillance mission; later focuses on protecting Gong-shil and developing genuine personal happiness.

Transitions from a guarded operative conducting surveillance on Joong-won into a sincere friend and protector who faces his supernatural phobias, accepts unrequited love, and opens his heart to romance.

Initially focused on validating her superiority over Gong-shil through fame and beauty; later motivated to win Kang Woo's sincere love.

Evolves from a vain, status-obsessed celebrity bitter over high school comparisons with Gong-shil into a comedic, endearing figure who abandons rivalries in persistent pursuit of Kang Woo's affection.

Initially tasked with supporting Joong-won's corporate life and monitoring the kidnapping fallout; later aims to nurture the protagonists' relationship and atone for his family's past.

Serves as a witty, loyal surrogate father who steers Joong-won toward emotional maturity, while privately confronting his familial ties to the kidnapping tragedy and securing restorative justice.