Ui Mashiro (宇井真白) is a Japanese pop singer and idol managed by AKS. She is currently a member of HKT48 Team H.
- Birth Name: Ui Mashiro (宇井真白)
- Nickname: Mashiro (ましろ)
- Date of Birth: January 31, 2000
- Place of Birth: Fukuoka, Japan
- Blood Type: A
- Height: 155cm
- Bands / Groups:
HKT48 Song Participation
- HKT48 Kenkyuusei "PARTY ga Hajimaru yo"
- HKT48 Kenkyuusei "Nounai Paradise"
- HKT48 Himawari-gumi 1st Stage "Pajama Drive"
- HKT48 Team H 2nd Stage "Seishun Girls"
- HKT48 Team H 3rd Stage "Saishuu Bell ga Naru"
- HKT48 Team KIV 1st Stage "Theater no Megami"
- HKT48 Himawari-gumi 2nd Stage "Tadaima Ren'aichuu"
- HKT48 Team H 4th Stage "Theater no Megami"
- HKT48 Team KIV 2nd Stage "Saishuu Bell ga Naru"
AKB48 Song Participation
- Originally a second generation member of HKT48 Kenkyuusei, she was promoted to Team H on March 21, 2014.
- Hobbies: Singing
- Special Skill: Basketball, dance
- Charm Point: Dimples