- Stage Name: Youna (유나)
- Real Name: Choi Yuna (최유나)
- Birthdate: June 14, 1996
- Birthplace: Daegu, South Korea
- Height: 163cm
- Weight: 40kg
- Specialty: Guitar, Rap
- Hobby: Playing games, Skiing
- Motto: "Life is rock and roll!"
- Education: Dongduk Women’s University
- She was in the long distance track and field team.