What is the name of the girl with gray hair in vocaloid?

I'm not completely sure which one you are talking about, but I believe you are talking about Haku Yowane. She has long silver-gray hair in a ponytail with a black and bluish-purple bow, a gray shirt cut above the belly button, long black pants with a purple chsin, and her character item is sake (alcohol). She is depicted as a failed version of Miku. For more info, check here: http://Vocaloid.wikia.com/wiki/Haku_Yowane