|Name||HEEJIN | 희진|
|Full Name||Jeon Heejin | 전희진 | 田姬振|
|Born||October 19, 2000|
|Hometown||Daejeon, South Korea|
|Height||161cm | 5′-03″|
|Family||Mother, Father, Two Older Sisters, Three Dogs|
|Education||Hansung Girls’ High School|
Saintpaul Girls’ Middle School
|Years Active||2016 – present|
- Heejin was introduced as the first member of LOONA on September 25, 2016.
- Personal Animal: Rabbit | Personal Color: Bright Pink
- She received an audition offer from a Polaris Entertainment (BlockBerry Creative) staff through Instagram Direct Message. Heejin got into BlockBerry Creative as a trainee after she passed her audition in 2015 and debuted as a member of LOONA in 2016.
- Training Period: 1 year
- She can speak Korean and Japanese.
- She can play the guitar.
- Hobby: sudoku
- She has a fear of birds.
- She is interested in travel.
- Ideal Type: a person who has pretty hands and a nice smile.
- Role Model: Sim Gyuseon
- MBTI: ENTJ
- Eating spicy food is one of her ways to relive stress.
- Some people say she looks like MOMOLAND NANCY.
- Heekki: Heejin + tokki (rabbit)
- Animal: dogs
- Artist: Sim Gyuseon
- Character: Stitch
- Food: bread, tteokbokki (spicy stir-fried rice cakes)
- Fruit: avocados
- Oldest Sister
She works in the field of biology.
- Second Oldest Sister
She has a degree in Biology.
Breed: Dachshund Beagle Mix
- Tori (dog)
- Bori (dog)
MIXNINE (2017 – 2018)