- BirthName: Moriwaki Yui (森脇由衣)
- Nicknames: Yuipyon (ゆいぴょん), Yui (ゆい)
- Date of Birth: February 28, 1998
- Place of Birth: Fukuoka, Japan
- Blood Type: A
- Height: 155cm
- Bands / Groups:
- AKB48 Song Participation
- "Kokoro no Placard" single
- 47 no Suteki na Machi e (47の素敵な街へ) (Team 8)
- "Kibouteki Refrain" single
- Seifuku no Hane (制服の羽根) (Team 8)
- Stage Units
- AKB48 Team 8 1st Stage "PARTY ga Hajimaru yo"
- Classmate (クラスメイト)
- Originally a member of AKB48 Team 8 as the first representative of Fukuoka, she announced her departure on January 26, 2015.