| Full Name | Mark Lee Lee Min-hyung |
| Stage Name | Mark |
| Native Name | 이민형 |
| Birthday | August 2, 1999 |
| Age | 25 years and 10 months old |
| Zodiac Sign | Leo |
| Birthplace | Vancouver Canada |
| Height | 5’9″ (175 cm) |
| Weight | 141.1 lbs (64 kg) |
| Blood Type | A |
| MBTI | INFJ |
| Education | School of Performing Arts Seoul |
| Languages | English, Korean |
| Group | NCT NCT 127 NCT Dream NCT U SuperM |
| Social Media | Instagram: [@onyourm__ark] |