Akiko (亜希子)
(http://picroda.jphip.com/akb48/jphip19746.jpg)
Blog: http://ameblo.jp/natsuko-akiko/ (http://ameblo.jp/natsuko-akiko/)
Agency: http://www.wintarts.jp/talent.php?mode=view&no=2 (http://www.wintarts.jp/talent.php?mode=view&no=2)
She's also an actress!
She is Natsuko's (another new SDN member) older sister.