| Birth Name | Chou Tzuyu (周子瑜) |
| Stage Name | Tzuyu (쯔위) |
| Birthday | June 14, 1999 |
| Nationality | Taiwanese |
| Height | 170 cm |
| Weight | 48 kg |
| Blood Type | A |
| MBTI | ISFP-A |
| Group | TWICE |
| Company | JYP Entertainment |
| Position | Lead Dancer, Sub-Vocalist, Visual, Maknae |
| Korean Name | Chou Tzu-yu (저우쯔위 / 주자유) |
| English Name | Sally Chou |
| Zodiac Sign | Gemini |
| Chinese Zodiac Sign | Rabbit |