Full Name: Lee Ki Seop (이기섭)
Position: Vocalist and main dancer of the group
Birthdate: 1991 January 17
Height: 180 cm
Blood Type: A
Skills: Poppin’ dance, beatbox, taekwondo
Hobbies: Music, photo
About: Joined the group in 2009. He is a former ulzzang (still is). In 2009/2010 he appears on the second season of Uljjang Shidae.