| Full Name | Yamaguchi Mako |
| Stage Name | Mako |
| Native Name | 山口真子 |
| Birthday | April 4, 2001 |
| Age | 24 years and 4 months old |
| Zodiac Sign | Aries |
| Birthplace | Fukuoka, Japan |
| Height | 5’3″ (159 cm) |
| Weight | – |
| Blood Type | A |
| MBTI | ESFJ |
| Education | – |
| Languages | Korean, Japanese |
| Group | NiziU |
| Social Media | – |