Choi Yu-jin

Choi Yu-jin (; born August 12, 1996), known mononymously as Yujin, is a South Korean singer and actress. Originally debuting in 2015 as a member of the South Korean girl group CLC, she is a member and leader of Kep1er after finishing in third place in the final episode of the survival show Girls Planet 999. She began her acting career in 2016 in a supporting role in the Naver TV web drama, Nightmare High.

Early life Choi Yu-jin was born on August 12, 1996, in Wansan District, Jeonju, South Korea. She attended high school at Hanlim Multi Art School and graduated in February 2015.

In 2013, Choi collaborated with then-Cube artist and Beast member Yang Yo-seob in "Perfume" which was released on April 30 as part of Cube Entertainment's first "Voice Project". She was credited under the pre-debut group Cube Girls.

In 2014, alongside three of the soon-to-be CLC members, Sorn, Seungyeon and Yeeun, Choi appeared in BtoB's "Beep Beep" music video. In the same year, all five of the original members of CLC appeared in G.NA's "G.NA's Secret" music video and participated in promotional activities as backing dancers. In 2015, the quintet did a voluntary street busking performances to help children with developmental disabilities, attracting attention as a warm 'Hongdae idol' as part of their pre-debut activities. They released a self-composed song "You're My Love" on March 13, 2013, through the online music site Melon and the official YouTube channel.

2015–2020: Debut with CLC and acting debut

On March 13, 2015, Cube Entertainment released the profile information and images of Choi as the fourth member of CLC following Yeeun, Sorn, and Seungyeon, through their official social media. In Cube's words: "Choi Yu-jin, who has all the visual elements to be called a 'heavenly idol', aims to become the strongest idol's 'proportioner' with an unusual physical condition." She was introduced as a vocalist and dancer of the group and can cross various genres such as belly dance, popping, rocking, and house dance with a high understanding and expressiveness of dance performance. Along with member Seungyeon, she is considered to be one of CLC's 'top two dancers'.

Choi made her debut as a member of CLC on May 19, 2015, with the release of the single "Pepe" off the five-track EP First Love, of which all the proceeds were donated to children with developmental disabilities.

On August 17, 2015, she joined the cast of Real Man for the third season's female soldier special as the youngest member among the ten entertainers including rapper Jessi, Japanese broadcaster Sayuri Fujita and former national tennis player Jeon Mi-ra. She gained wider recognition after joining the show, where she drew attention over her small face and slender body frame, measuring 162 cm and 42 kg, taking first place in push-ups despite her skinny arms that couldn't even measure blood pressure. Later, she went viral with the caption "Choi Yu-jin's 3-stage transformation into a female soldier" from a 'pretty and fresh girl' to a 'dignified baby soldier' for which she received the nickname "Baby Soldier" and "Patriotic Idol" from soldiers of the Armed Forces and viewers of the show. Choi's appearance on the show ended in late September 2015. At the end of the year, Choi shared a stage with cast member Jessi and Kim Hyun-sook performing S.E.S' "I'm Your Girl" at the 2015 MBC Entertainment Awards.

In 2016, Choi made her acting debut in the Naver TV web drama Nightmare High as Cheon Yoo-na. The same year, she was cast as one of the female leads in Green Fever, a prequel to Lily Fever (2015). She plays the role of a rookie actor who has emerged as the nation's little sister and is the only actress affiliated with Jin Entertainment. She worked with Kim Hye-jun and Jung Yeon-joo.

2021–present: Girls Planet 999, debut with Kep1er, and CLC cease activities

In 2021, Choi made a cameo in the Netflix drama, So Not Worth It. In June 2021, Choi joined the Mnet survival show Girls Planet 999 as one of the program's 33 Korean contestants. She consistently ranked in the Top 9 as the show progressed and ultimately finished in 3rd place, allowing her to debut with the winning group, Kep1er, as the leader.

On December 3, 2021, it was revealed that Choi would be starring in the web drama Pumpkin Time which premiered December 14, 2021. On May 20, 2022, Cube Entertainment announced that CLC had ceased being active.

On May 30, 2024, Choi was confirmed to be in the lineup of Kep1er members who had renewed their contract with WakeOne Entertainment.

On July 6, 2026, Else Entertainment announced through its official Instagram account that Choi had signed with the agency.

Discography

Singles Title Year Peak chart positions Sales Album KOR "Perfume" 2013 22 KOR: 172,881 "Follow your dreams" 2018 — "—" denotes releases that did not chart or were not released in that region.

Soundtrack appearances Title Year Album "See U There" 2024 Unknown Untitled Unmastered OST

Songwriting credits Year Artist Song Album Lyrics Music 2015 CLC 2021–2022 Pumpkin Time Han Su

Television shows Year Title Role Notes 2015 Real Man Cast member Season 2, Female Edition 3 as Poison Spider Unit 2021 Girls Planet 999 Contestant Survival show that determined Kep1er membersFinished 3rd

Music video appearances Year Artist/Band Title 2014 BtoB "Beep Beep" G.NA "Secret" 2016 Johan Kim "Y.O.U" 2026 Sorn "Good Luck! "

Video games Year Title Role 2026 Locked in Love: The Office Chaeeun

Awards and nominations

+ Name of the award ceremony, year presented, category, nominee of the award, and the result of the nomination Award ceremony Year Category Nominee / Work Result Korea First Brand Awards 2025 2024 Female Acting Idol Unknown Untitled Unmastered [UUU] MBC Entertainment Awards 2015 Best Teamwork Award Real Man Season 2 – Female Edition 3