- Birthday: January 8, 1993
- Blood Type: AB
- Height: 176 cm (5’9″)
- Instagram: @cg_yongseok
- Position: Main Vocalist, Maknae
- Real Name: Kim Yongseok (김용석)
- Stage Name: Yongseok (용석)
- Weight: 64 kg (141 lbs)
- Zodiac Sign: Capricorn
aug 17 2017 ∞
oct 19 2017 +
oct 19 2017 +