
Screencap from no akb no life blog. Rehosted as to not hotlink.

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Name: Hirata Rina (平田梨奈)
Nickname: Hirarii (ひらりー)
Birthdate: July 16, 1998
Birthplace: Fukuoka, Japan
Height: 149cm
From what I have read so far, it seems she was born in Fukuoka but grew up in America which explains her native-sounding accent when speaking English. Even with the sometimes odd sentence structure and/or word selection her English is really good; maybe Kondo Sayaka level? Apparently she took ballet since she was super young as well. Despite her being born in Fukuoka, I'm not going to hold my breath that she'll be speaking any Hakata-ben like Shiichan or Mariko do.
For those who haven't downloaded the 12th gen self intros from the tracker yet, here's hers:
http://www.youtube.com/watch?v=Vjlh8mf9XVw
I actually think her stumbling over her Japanese is cuter than her English speaking.