Seo Yi-kyung is a former firefighter whose discipline and physical strength make her one of the few residents truly equipped to survive the outbreak. Grieving a fiance who vanished before the chaos, she channels her loss into relentless action, becoming a frontline defender of the Green Home.
Her competence quickly elevates her into a leadership role, and she takes on dangerous expeditions outside the safety of the barricades when no one else will. Beneath the steel is a woman driven by a personal search that ties her directly to the deeper mysteries of the infection.
As the seasons unfold, Yi-kyung's storyline grows tragic and consequential, linking her grief to the origins of the monster phenomenon and forcing devastating choices. Lee Si-young brings a real athlete's physicality to the part, grounding Yi-kyung as one of the series' most formidable and emotionally weighted survivors.
Key Episodes
S1 E1
Episode 1
Yi-kyung establishes herself as a capable, no-nonsense survivor as the building descends into panic during the first wave of transformations.
S1 E10
Season 1 Finale
Yi-kyung's resolve and her hidden personal stakes drive key events in the climax, foreshadowing the larger role her past will play later.
Seo Yi-kyung is one of the central figures in Sweet Home, a horror/drama/thriller series that aired on Netflix from 2020-2024. Within the narrative of Sweet Home, Seo Yi-kyung serves as a pivotal character whose decisions and relationships drive key story arcs throughout Seasons 1-3. The character's journey has been central to many of the show's most memorable and discussed moments.
Portrayed by Lee Si-young, Seo Yi-kyung has become one of the most recognizable characters in modern television. Lee Si-young's performance brings nuance and depth to the role, creating a character that resonates with audiences on both intellectual and emotional levels. Lee Si-young's work has been recognized with 1 major award, reflecting the critical acclaim their portrayal has received.
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? Frequently Asked Questions
Lee Si-young plays Seo Yi-kyung in Sweet Home.
Seo Yi-kyung is a former firefighter and one of the Green Home's strongest defenders, whose search for her missing fiance ties her to the deeper mysteries of the outbreak.
