Wow, every time I look I discover new things I love about this compilation. Your shading is lovely and Chell's expressions are amazing. And the way you drew each robot is so great, I know I couldn't draw anything looking this close to the original CGI. Anyway, sorry to babble. !
The first thing that popped into my head at first glance was Asian for some reason. I suppose people's interpretations of her also depend on which game they're going by, seeing as Chell's face looks a little different in the first game to the second.