J is the elder of her parents' two children; she has one younger brother. J has two pet cats named Cami and Tan at home.
J graduated from Hongik University Girls' High School on February 9, 2023.
Debut with STAYC: October-November 2020
J was unveiled as the fifth member of STAYC through her prologue film on October 13, 2020. The group formally launched on November 12 with their first single album "Star To A Young Culture."
J Facts- J was born in Daejeon, South Korea.
- She was born in the South Korean city of Daejeon, Chungcheong.
- She was introduced to the lineup on October 14, 2020.
- Jessi is a role model.
- She enjoys eating snacks or little meals.
- She is a former JYPE trainee who may have made her debut with NMIXX.
- She wishes to travel to Europe, preferably to Switzerland.
- Interests: Friends, music, working out, painting, and sports.
- She has a high school diploma.
- The Formosan deer is her favorite animal.
- She suffers from lactose intolerance.
- Her nicknames are Jjang J, William.
- Tan-e is the name of her British shorthair cat.
- She'd like to work with Dua Lipa or Billie Eilish.
-She is in charge of low notes, whereas Sieun is in charge of high notes.
- Wind is her representative item.
- She is friends with NMIXX's Bae.
- Attractive features: hair, low-pitched voice.
- She stated that dealing with STAYC is her number one pastime, along with attending their fancafé and painting.
- She is the group's rapper, vocalist, and maknae.
- Rapunzel is her favorite Disney princess because she chases her dreams.
- She prefers cartoon films to live-action films.
- She used to have a high-pitched singing voice until her trainer taught her how to sing in a low tone, similar to Dua Lipa.
- J is The Faceshop's major endorser.