| Full Name | Jeon Hee-jin |
| Stage Name | HeeJin |
| Native Name | 전희진 |
| Birthday | October 19, 2000 |
| Age | 24 years and 8 months old |
| Zodiac Sign | Libra |
| Birthplace | Bundang-gu, South Korea |
| Height | 5’4″ (161 cm) |
| Weight | 101.4 lbs (46 kg) |
| Blood Type | A |
| MBTI | ENTJ |
| Education | Hansung Girls high school |
| Languages | Korean, Japanese, Portuguese |
| Group | ARTMS LOONA |
| Social Media | Instagram: [@0ct0ber19] |