- Birth Name: Sakaki Miyu (榊美優)
- Nicknames: CUCA (くーか), Sakaki (さかき)
- Date of Birth: April 28, 2002
- Place of Birth: Kagawa, Japan
- Blood Type: O
- Height: 151cm
- Bands / Groups:
- Currently a first generation member of STU48.
- Prior to STU48, she was best known as a YouTuber under the name CUCA, where she performed dance and song covers of Hello! Project songs. Her channel was started in 2008 and has been cleared of all content after she joined STU48.
- Auditioned for Morning Musume's 11th and 12th generations.