Black Rock Shooter - The Game/Nana Gray

Nana Gray
Nana Gray (ナナ・グレイ Nana Gurei) is one of the characters in Black★Rock Shooter THE GAME. She is set to be one of Black★Rock Shooter's allies and a main protagonist. She is considered to be Black★Rock Shooter's prototype and is voiced by Miyuki Sawashiro. According to Gray's game trailer she has a very close relationship with BRS and sees herself as a 'not failed but not successful' creation. Gray's weapon of choice is a longsword with two tooth-like peaks at the edge and a black and orange color scheme.

Plot
Nana is one of the 22 2nd-generation combat clones born to combat the alien invasion. Unlike her 21 other sisters, she was born a day later on 7th July 2034 due to problems in equipment.

All Information was received from:
http://blackrockshooter.wikia.com/wiki/Nana_Gray