- Name: Ishikawa Natsumi (石川夏海)
- Nickname: Nacchan (なっちゃん), Natsumi (なつみ)
- Birthdate: June 15, 1996
- Birthplace: Chiba, Japan
- Blood Type: A
- Height: 163cm
- Specialties: Remembering people's names.
-  Last Idol
- She was crowned the "Princess of Gravure" in the YA Gura-Hime 2017 (Young Animal Gravure Princess 2017) competition.