
Birth Name: Lee Ye Jin
Birthday: February 12, 2000
Birthplace: Seocho-gu, Seoul, South Korea
Blood Type: B
Height: 169cm (5’5)
MBTI: ESTJ
Representative Animal: Arctic Fox
Zodiac Sign: Aquarius
Chinese Zodiac: Dragon
Position in H1-KEY: Leader, Vocalist
Specialty: English
- She is a previous YG Entertainment trainee.
- The other members called her “Boss Baby” because she looks and talks like a baby but is the oldest and leader.

Birth Name: Lee Seung Hyun
Birthday: February 21, 2001
Birthplace: Seoul, South Korea
Blood Type: B
Height: 172cm (5’7)
MBTI: ESTJ-A
Representative Animal: Kangaroo
Zodiac Sign: Pisces
Chinese Zodiac: Snake
Position in H1-KEY: Vocalist
Specialty: Japanese, Acting
- She is a previous WM Entertainment trainee.
- Hwiseo called her the “talk leader” the group.
- She competed in Produce 48 and Queendom Puzzle.
- Seoi’s nickname for her is “Honey”.
- She is the 2nd member to get her driver’s license.
- She has a pet dog.

Birth Name: Jo Hwi Hyeon
Birthday: July 31, 2002
Birthplace: Seoul, South Korea
Blood Type: A
Height: 169cm (5’5)
MBTI: INFJ
Representative Animal: Baby Seal
Zodiac Sign: Leo
Chinese Zodiac: Horse
Position in H1-KEY: Main Vocal, Rapper
Position in EL7Z UP: Main Vocal
Specialty: Vocal, Dance
- She is a previous Source Music, The Black Label and FNC Entertainment trainee.
- She called herself the “fashion leader” of the group.
- She has a dog named Richie and two cats, named Woody and Angko.
- She has her driver’s license.
- She competed in Queendom Puzzle and won first place.
- She loves animals and carries cat food with her in case she finds a hungry cat.

Birth Name: Han Shin Young
Birthday: December 25, 2004
Birthplace: South Korea
Blood Type: A
Height: 174cm (5’8)
MBTI: ISTJ
Representative Animal: Red Panda
Zodiac Sign: Capricorn
Chinese Zodiac: Monkey
Position in H1-KEY: Main Dancer, Rapper, Vocalist, Maknae
Specialty: Contemporary Dance, Acrobatics
- She is a previous JYP Entertainment trainee.
- Hwiseo called her the “dance leader” of the group.