She was born in Incheon, South Korea and has one older brother and one older sister. The CEO of Source Music saw her walking on the street and invited her to make an audition. She attended the Seoul School of Performing Arts and graduated in February 2017.
- She is the lead rapper of the girl group GFRIEND.
- She is the youngest in the band.
- Her Zodiac sign is Leo.
- Her ideal type is Cha Tae Hyun.
- Umji calls herself as "the Consultant" of GFriend because the members go to her when they have a problem.
- She is born into a rich family. Her father is the CEO of a famous dentist group called "Moa Dentist Group".
- Her and Yerin have the same birth date, but different year.
- Her and Yuju are the English speakers of the group.
- Her religion is Christianity.
- She's a big fan of Disney.
- Her favorite Disney movie is "The Little Mermaid".
- She likes singing Disney OSTs.
- She hates bugs.
- She likes to collect cosmetic products.
- Her hobbies are: watching the sky in the morning and cooking.
- She has natural double eyelids.
- Her stage name Umji means "thumb" in Korean.
| To view the Umji gallery, click here.