Who in the heck is the blonde chick harring Issac in Dead Space 2?

If she is Nicole, then the producers may have presumed, while making the game, that nobody had previously played Dead Space or even Dead Space Extraction. Call me blind or stupid, but that sure as heck isn't Nicole, not by a long shot. I'm talking about her face, and even the voice. If, presumably, the actress voicing Nicole in the previous game didn't want to voice Nicole in this game, then couldn't the producers have at least given her the same appearance?