*pounds fists on table* I WANT TO SEE MORE SUSAN IN STAN FREDERICK I WANNA KNOW ABOUT HER I WANNA SEE HER CHARACTER GROW AND I WANNA LOVE HER JUST AS MUCH AS STAN DOES BECAUSE I'M GUESSING SHE'S AWESOME BUT I WANNA /SEE/ IT
Susan isn’t a character - she’s a meta narrative device and an important distinction between real people and characters. Susan is as real a person as can be in this world, and to me, that’s way more interesting. We can’t know her because she refuses to be known while on camera - which is one of the most distinct aspects of her character.
There’s a lot more about how she’s the “anti-Stan” in terms of character things, but I’m gonna save that for the commentary.
(Also: I would never put my girlfriend in a spot where I would ask her to act more than she already has, because she doesn’t love doing it. She offered to help me with this season because I had ideas to include Susan and she was totally fine with being in it despite her discomfort of being on camera. I decided to work that into her character - and it’s worked extremely well for us, and keeps her role in the series to a minimum while still being a clearly essential factor in Stan’s life.)