I think the colored robot from june 29th is the pic so far. At least I like it most.
And with the faces. Maybe it helps, if you drew some *quick* studies from reference. I know that it is a little bit lame copying fotos, but we have to use the resources we have. I´ve screen captured some scenes from some dvds (whereever the actress had a different face expression) and I´ll do some studies as soon I´ve got some time left. Hope it will help.