Cha Si-a — The Legend of the Blue Sea Character Profile

About Cha Si-a

Joon-jae's college classmate and unrequited admirer. She maintains a friendly relationship with him throughout the series and eventually becomes engaged to his tech-savvy friend Tae-oh by the end.

Character Facts

Played by

Shin Hye-sun

Appears in

The Legend of the Blue Sea (2016)

Role

Supporting

Relationships (3)

• Cha Si-a — Romantic Love Interest — Heo Joon-jae / Kim Dam-ryung (Lee Min-ho)

  Former romantic interest who still has feelings for Joon-jae

• Cha Si-a — Conflict Rival — Kang Seo-hee (Hwang Shin-hye)

  Both women have complicated feelings for Joon-jae

• Cha Si-a — Conflict Rival — Sim Chung / Se-hwa (Gianna Jun)

  Rival for Joon-jae's affection

Explore the full interactive character relationship map of The Legend of the Blue Sea

More characters from The Legend of the Blue Sea

• Sim Chung / Se-hwa (Gianna Jun)
• Heo Joon-jae / Kim Dam-ryung (Lee Min-ho)
• Jo Nam-doo / Park Moo (Lee Hee-jun)
• Heo Chi-hyun (Lee Ji-hoon)
• Tae-o (Shin Won-ho)
• Kang Seo-hee (Hwang Shin-hye)
• Young Sim Chung (Kal So-won)
• Min-ji (Krystal Jung)
• Young Heo Joon-jae (Jinyoung)
• Young Sim Chung (Shin Eun-soo)
• Hong Dong-pyo (Park Hae-soo)
• Young Heo Joon-jae (Jeon Jin-seo)