Karakter utama

• Jang Shin-young - Jeon Se-mi/Jennifer Dyer Mason/Choi Seo-yeon
• Kang Kyung-joon - Kang Hyuk-min
• Seo Do-young - Park Nam-joon
• Sa Hee - Kang Ji-min[2]
• Jung Ji-yoon - Chun Soo-ji
• Lee Won-suk - Baek Seo-won

Karakter sokongan

• Kim Byung-choon - Kang Joo-chul
• Cha Hwa-yeon - Min Hwa-young
• Choi Woo-suk - Yoo Je-joon
• Kang Shin-il - En. Jeon (kameo)
• Kim Chung - Pn. Hong (kameo)
• Kim Ji-young - nenek Nam-joon
• Lee Deok-hee - Lee Jin-sook
• Yoo Ah-mi - Park Sun-young
• Kim Kyung-sook - Pn. Hyun
• Ahn Suk-hwan - Baek Doo-jin
• Park Jin-joo - Park Nam-hee
• Kim Kwon - Kang Sung-min
• Kang Ye-seo - Yoo Ye-ji
• Lee Chul-min - Kim Baek-choon
• Kim Young-bae - Detektif Seo