This, suprisingly, took me a while... I wanted to draw P-body and Atlas again and I thought this would be cute. I lengthened the white on P-body's shirt because she has more white than black on her main core processor. And yes, they be a couple...
Portal (c) VALVe
Edit: I know the coloring on their boots ins't accurate. I didn't have the resourses to look it up or observe in-game, so suck it up!
Oh and ignore my crappy coloring of the skin. I was sitting on my couch doing this and we only have 2 lamps in the room. It was either that sit in the kitchen with my mother... and that would've been a NO!!