Name: Hirajima Natsumi (平嶋夏海)
Nickname: Nacchan (なっちゃん)
Birthdate: May 28th, 1992
Birthplace: Tokyo, Japan
Blood Type: O
Likes: Collecting manga and books, teddy bears
Motto: "Smile as much as possible." (できるだけ笑顔でいること)
Saying: "Do it when you can do it." (やる時はやる)
Measurements:
- Height: 154cm (5'0")
- Bust: 80cm
- Waist: 56cm
- Hips: 83cm
- Watarirouka Hashiritai
- Team A 1st Stage - Hoshi no Ondo (2nd unit)
- Team A 2nd Stage - Nagisa no CHERRY
- Team A 3rd Stage - Nage Kiss de Uchi Otose!
- Team B 1st Stage - Ame no Doubutusen
- Team B 1st Stage - Fushidara na Natsu
- Team B 2nd Stage - Glass no I LOVE YOU
- Team B 2nd Stage - Senaka Kara Dakishimete
- Team B 2nd Stage - Rio no Kakumei
- Team B 3rd Stage - Pajama Drive
- Team B 4th Stage - Kuchiutsushi no Chocolate