- Birth Name: Yoon Byeongok (윤병옥) but he legally changed his name to Yoon Jisung (윤지성)
- Birthday: March 8, 1991
- Blood Type: B
- Height: 175 cm (5’9″)
- Nationality: Korean
- Position: Sub Vocal, Leader
- Stage Name: Jisung (지성)
- Weight: 63 kg (139 lbs)
- Zodiac Sign: Pisces
aug 18 2017 ∞
aug 18 2017 +
aug 18 2017 +