I have no idea about Portal and what its about. All I know is that this is where "The cake is a lie" thing came from.
I guess its good to know that I'm not a dork.

I figured Gordon Freeman would be Chell's natural pairing partner, but I don't read fanfic.

I also don't know if turning the non-human Portal characters human was started in places like DeviantArt or if they were the creation of Cosplayers who couldn't think of a practical way to construct a realistic GLaDOS costume.

true

There are few things on this gay earth sadder than somebody sinking countless hours into an animation but spending 5 minutes writing. If you're gonna go to all that effort why not actually put some effort forward in being original?

@WWD

True, but on the other hand, if you're a nobody in the animation biz, and want to get noticed while showcasing your talents, why not use a subject that already has wide appeal in the target demographic?

Kind of a cop-out yeah, but it DID get people talkin'

In a nutshell:

The bionic Lady Gaga thing is GlaDOS, a rogue A.I. who took over the research facility it was created in and killed all the scientists. She's something of a cross between Shodan and AM.

The woman in the tank top is Chell. (possibly short for "Michelle") Chell was a "test subject" in suspended animation when the facility was gassed.

In the first game, GlaDOS revives Chell long after the facility is abandoned and makes her run a sort of obstacle course, ostensibly to test a device that creates portable wormholes. Chell proves to be more clever and resourceful than GlaDOS thought, escapes the maze and wrecks her tormentor but is unfortunately knocked unconscious and put back into suspended animation by the robots who maintain the facility.

In the second game, Chell is revived by Wheatley (the guy in the glasses) another A.I. who wants Chell to help him take over as controller of the facility. In attempting to install himself in the core computer, he accidentally activates GlaDOS. He's somewhat less than competent.

The plot and dialogue were written by Chet & Eric of "Old Man Murray" fame. Your favorite line is funnier in light of the fact Chell never speaks.

Appendix: Chell never speaks because she's severely brain-damaged from an indeterminate amount of time in suspended animation. Part of the tutorial of the game involved Wheatley asking Chell to say "apple" during a post-waking diagnostic, and all she could do in response is jump.

I mention this because it delighted me.

Is it that or is she just being obstinate?

It's definitely brain damage. Wheatley notes that's what he's testing for right before asking her to speak.