Group Position : Leader, Vocalist.
Date of Birth: January 9, 1990.
Nicknames : 4-D Jihyun, , NamGee, Namdakyu / Namdocu
Height / Weight / Blood Type : 167cm / 49kg / Type ‘A’.
Specialty : Dancing, Ballet.
Debut : : in 4minute with the single “Hot Issue”, 2009
Hobbies : Just Dancing.
Education ; Sangmyeong University, (Major in Ballet, leave of absence)