| Full Name | Mark Yi En Tuan |
| Stage Name | Mark |
| Native Name | 段宜恩 |
| Birthday | September 4, 1993 |
| Age | 31 years and 9 months old |
| Zodiac Sign | Virgo |
| Birthplace | Los Angeles, California, United States |
| Height | 5’9″ (175 cm) |
| Weight | 132.3 lbs (60 kg) |
| Blood Type | A |
| MBTI | INTJ |
| Education | Arcadia High School |
| Languages | Korean, English, Chinese, Japanese, Spanish, Portuguese |
| Group | GOT7 |
| Social Media | Instagram: [@marktuan] Twitter (X): [@marktuan] TikTok: [@marktuan] |