- Full name: Chou Tzu-yu
- Date of Birth: June 14, 1999
- Nationality: Taiwanese (Taiwan)
- Blood type: B
- Group: Twice
- Agency: JYP Entertainment
- Debut: October 19, 2015
- Position in the group: sub vocalist, lead dancer
- Family members: mom, dad, older brother, Tzuyu
- Nickname: ‘Youngest but the Tallest, ‘Bbangsooni’- Bbang means bread in Korean. Tzuyu loves bread
