- Birth Name: Hiwatashi Yui (樋渡結依)
- Nicknames: Hiiwatan (ひーわたん), Yuipon (ゆいぽん)
- Date of Birth: April 30, 2000
- Place of Birth: Saitama, Japan
- Blood Type: A
- Height: 151cm
- Bands / Groups:
AKB48 Song Participation
|Kimi wa Melody||M.T. ni Sasagu||Yokoyama Team A|
|Tsubasa wa Iranai||Tsubasa wa Iranai|
|Set me free||Team A|
|High Tension||Osaekirenai Shoudou||Waiting Circle|
|Shoot Sign||Accident Chuu||AKB48 U-19 Senbatsu|
|Negaigoto no Mochigusare||Maebure|
|#SukiNanda||Tsuki no Kamen||Upcoming Girls|
|11gatsu no Anklet||Houtei Sokudo to Yuuetsukan||U-17 Senbatsu|
|Jabaja||Position||AKB48 Wakate Senbatsu|
|Tomodachi ga Dekita||Macharin to Nakamatachi.|
|Teacher Teacher||Atarashii Chime||Team B|
|Sustainable||Seishun Da Capo||AKB48 Coupling Senbatsu|
|Bokutachi wa, Ano Hi no Yoake wo Shitteiru||Tengoku no Kakurega|
- Romance Kakurenbo (Zensa Girl solo)
- "Nankin Tamasudare"
- Originally a candidate for the 2nd AKB48 Group Draft, she was drafted by AKB48 Team A in the first round and remained in Kenkyuusei until she was promoted to Team A on February 10, 2016. She was transferred to Team B during the AKB48 team shuffle in 2017. She announced her graduation on November 7, 2019. Her final handshake event was on November 23, 2019, and she graduated from the group on November 28, 2019.
- Hobbies: Watching TV, impersonations.
- Special Skill: Drums
- Likes talking to people.
- Says to be clumsy.
- Prior to AKB48, she was a former child actress and a member of Karat☆ from 2013 to 2014.
- She appears, alongside Takahashi Minami, in the 2008 drama SAITOU-san.
- Admires Watanabe Miyuki and Shimazaki Haruka.