- stage name: yeoreum (여름)
- birth name: lee jinsook (이진숙)
- chinese name: xia tian (夏天)
- position(s): lead rapper, sub vocalist
- sub unit: joy
- birth date: january 10, 1999
- birth place: seoul, south korea
- zodiac sign: capricorn
- blood type: a
- height: 161cm (5ft. 3in.)
jun 19 2017 ∞
jun 20 2017 +