|Name||HYUNSUK | 현석|
|Full Name||Yoon Hyunsuk | 윤현석 | 尹炫晳|
|Born||September 8, 2001|
|Hometown||Geumchon-dong, Paju, Gyeonggi, South Korea|
|Height||186cm | 6′-01″|
|Family||Mother, Father, Younger Sister, Two Younger Brothers|
Munsan Jeil High School (dropout)
Munsan Middle School
Geumsin Elementary School
|Years Active||2019 – present|
|Positions||Vocalist, Rapper, Dancer|
- Hyunsuk got into C9 Entertainment as a trainee in October 2017 and debuted as a member of CIX in July 2019.
- He received an audition offer from a casting director of C9 Entertainment at a dance competition.
- He sang Aegukga (the national anthem of South Korea) and danced to Never Ever by GOT7 for his C9 audition.
- Hobbies: watching movies, eating alone
- Specialties: badminton, basketball, cooking
- He was the class president in elementary school.
- He dropped out of high school in 2017 and got his GED in 2018.
- MBTI: ENFP
- He does not like mushrooms and eggplant.
- He modeled for an online shopping mall Sonyeonara before becoming a C9 trainee.
- Must Have Items: smartphone, perfume and earbuds
- Daewang Tokki (boss bunny)
- Parrot: Fellow CIX member Bae Jinyoung calls him a parrot because Hyunsuk talks too much.
- Beverage: iced tea
- Color: black
- Food: meat dishes (especially pork belly)
- Ice Cream Flavor: chocolate
- Scent: soapy
- Season of the Year: all four seasons
- Younger Sister
- Second Youngest Brother
- Youngest Brother
Name: Yoon Hyunyul | 윤현율
— CIX (@CIX_twt) March 29, 2020