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Yunjin
허윤진Huh Yun-jin (Jennifer Huh)
The pen behind “Perfect Night”, “CRAZY” and most of PUREFLOW.
생일 축하해 · 8 October
Happy birthday, Yunjin!
Yunjin turns 26 today. Happy birthday from Europe!It’s already 8 October in Seoul: Yunjin turns 26. Happy birthday from Europe!

Raised in Wisconsin and New York, Yunjin brought musical theatre and a guitar she taught herself to play to LE SSERAFIM. She writes more of the group's songs than anyone and has released a string of solo tracks.
Before LE SSERAFIM
She moved to the US at eight months old and came back to Korea at 16 to train. She competed on Produce 48 for Pledis Entertainment, finishing 26th, and signed with Source Music in 2021.
Highlights
- Writing credits on “Perfect Night”, “Smart”, “CRAZY”, “HOT”, “SPAGHETTI”, “CELEBRATION” and most of PUREFLOW Pt. 1.
- Solo songs: “Raise Y_our Glass”, “I ≠ DOLL”, “Love You Twice”, “Blessing in Disguise” and “Jellyfish” (2025).
- Featured on j-hope's “I Don't Know” and GroovyRoom's “Yes or No” with Crush (2024).
- Invited to join the Recording Academy, the organisation behind the Grammys, in August 2025.
Her FIM'S CLUB character
HeurimongA ghost who finds inspiration in books and music.
Things to know
- 01
Her English name comes from Jennifer Aniston; her sister is called Rachel, after the Friends character.
- 02
She sang mezzo-soprano in musical theatre at Niskayuna High School.
- 03
She taught herself guitar with Taylor Swift songs.