| Full Name | Marife Yau |
| Chinese Name | 邱彥筒 |
| Pinyin | Qiū Yàn Tǒng |
| Date of Birth | 11 June 2002 |
| Place of Birth | Hong Kong |
| Origin | Hong Kong |
| Ethnicity | Han Chinese |
| Occupation | Actress, Singer |
| Other Names | Qiu Yantong, Qiu Yan-Tong, Yau Yin-Tung, Marf Yau |
| Alma Mater | Lingnan Dr. Chung Wing Kwong Memorial Secondary School |
| Related Group | COLLAR |
| Debut Date | 2021 |