Real Name: Kim Jin Chul ( 김진철 )
Position: Leader, Rapper, Dance
Date of Birth: July 13, 1989 (age 20)
Height: 183cm
Weight: 68kg
Jin On was previously cast in the drama Cinderella Man, and also played the role of the male lead in SG Wannabe's "Gashiri" music video. Like fellow members, Kan and Ye Jun, Jin On was in a dance team that used to include several top singers in Korea, such as famous star Rain. He studied at the Ahn Yang High School of Art.
Leader Jinon has also been previously been training to debut in the group ChoShinSung (Supernova).