- Birth Name: Kuroiwa Yui (黒岩唯)
- Nickname: Yuiimo (ゆいーも)
- Date of Birth: August 11, 2002
- Place of Birth: Ehime, Japan
- Blood Type: A
- Height: 157cm
- Bands / Groups:
- STU48 (2017)
- Originally a first generation member of STU48, she announced her graduation on October 2, 2017 to focus on her studies.
- Was a finalist in the SKE48 7th generation audition.