I'm not saying you shouldn't abuse yourself to mental images of an alien but she just wasn't a robot in the flick.
GLaDOS - "... It says so right here in your personnel file; 'Unlikable. Liked by no one. A bitter unlikable loner whose passing shall not be mourned.' SHALL NOT BE MOURNED. That's exactly what it says. Very formal. Very official. It also says you were adopted. So that's funny too."