- Birthday: July 1, 1994
- Blood Type: A
- Height: 183 cm (6’0″)
- Nationality: Korean
- Position: Main Vocalist
- Real Name: Jeong Inseong (정인성)
- Stage Name: Inseong (인성)
- Weight: 71 kg (156 lbs)
- Zodiac Sign: Cancer
aug 17 2017 ∞
aug 17 2017 +
aug 17 2017 +