Gong Jin Joo
Actor Name: Kang Byul
Gong Jin Joo (Kang Byul) is the birth sister of Gong Hyuk Suk (Choi Tae Joon). She dislikes having an ex-convict as her step-father and creates problems for her step-brother Gong Joon Soo (Im Joo Hwan) when she was younger. Due to the family’s financial problems, she drops out of school and gives up her dreams of becoming a ballet dancer. When Joon Soo is imprisoned, she works as an assistant in a hair salon to support the family.