So what's the deal with the lines on her face? What are those for?

Okay, so what we have is we have edge loops. So what we have here is we have edge loops that come around to kind of follow the muscle that goes around the mouth, and it helps expand things like eyes, mouths. Then we have edge flow, which runs...

So these are like tracking points.

Yeah, well, it's like flow of geometry. If we don't have the flow right, when you start animating the character, it will actually break the geometry. So we follow basic muscle structure for the most part, and it helps pull the stretch and whatnot.